Halliday/Resnick/Walker Fundamentals of Physics 8th edition

1
Halliday/Resnick/WalkerFundamentals of Physics
8th edition

• Classroom Response System Questions

Chapter 4 Motion in Two and Three Dimensions
Reading Quiz Questions
2
4.2.1. Which one of the following statements
concerning the displacement of an object is
false? a) Displacement is a vector quantity
that points from the initial position of an
object to its final position. b) The magnitude
of an objects displacement is always equal to
the distance it traveled from its initial
position to its final position. c) The
magnitude of an objects displacement is the
shortest distance from its initial position to
its final position. d) The direction of an
objects displacement is indicated by an arrow
that begins on the initial position of the object
and ends on its final position. e) The length
of the arrow representing an objects
displacement is proportional to its magnitude.
3
4.2.1. Which one of the following statements
concerning the displacement of an object is
false? a) Displacement is a vector quantity
that points from the initial position of an
object to its final position. b) The magnitude
of an objects displacement is always equal to
the distance it traveled from its initial
position to its final position. c) The
magnitude of an objects displacement is the
shortest distance from its initial position to
its final position. d) The direction of an
objects displacement is indicated by an arrow
that begins on the initial position of the object
and ends on its final position. e) The length
of the arrow representing an objects
displacement is proportional to its magnitude.
4
4.2.2. At time t1 0 s, the position vector of a
sailboat is . Later, at time t2, the sailboat
has a position vector . Which of the
following expressions correctly indicates the
displacement of the sailboat during the time
interval, t2 ? t1? a) b) c) d)
- e) -
5
4.2.2. At time t1 0 s, the position vector of a
sailboat is . Later, at time t2, the sailboat
has a position vector . Which of the
following expressions correctly indicates the
displacement of the sailboat during the time
interval, t2 ? t1? a) b) c) d)
- e) -
6
4.2.3. A delivery truck leaves a warehouse and
travels 3.20 km east. The truck makes a right
turn and travels 2.45 km south to arrive at its
destination. What is the magnitude and direction
of the trucks displacement from the
warehouse? a) 4.03 km, 37.4? south of east b)
2.30 km, 52.5? south of east c) 0.75 km, 37.8?
south of east d) 2.40 km, 45.0? south of
east e) 5.65 km, 52.5? south of east
7
4.2.3. A delivery truck leaves a warehouse and
travels 3.20 km east. The truck makes a right
turn and travels 2.45 km south to arrive at its
destination. What is the magnitude and direction
of the trucks displacement from the
warehouse? a) 4.03 km, 37.4? south of east b)
2.30 km, 52.5? south of east c) 0.75 km, 37.8?
south of east d) 2.40 km, 45.0? south of
east e) 5.65 km, 52.5? south of east
8
4.3.1. Which one of the following quantities is
an objects displacement divided by the elapsed
time of the displacement? a) average
velocity b) instantaneous velocity c) average
displacement d) average acceleration e)
instantaneous acceleration
9
4.3.1. Which one of the following quantities is
an objects displacement divided by the elapsed
time of the displacement? a) average
velocity b) instantaneous velocity c) average
displacement d) average acceleration e)
instantaneous acceleration
10
4.3.2. While on a one-hour trip, a small boat
travels 32 km north and then travels 45 km east.
What is the magnitude of the boat's average
velocity for the one-hour trip? a) 39 km/h b)
55 km/h c) 77 km/h d) 89 km/h e) 96 km/h
11
4.3.2. While on a one-hour trip, a small boat
travels 32 km north and then travels 45 km east.
What is the magnitude of the boat's average
velocity for the one-hour trip? a) 39 km/h b)
55 km/h c) 77 km/h d) 89 km/h e) 96 km/h
12
4.3.3. While on a one-hour trip, a small boat
travels 32 km north and then travels 45 km east.
What is the direction of the boat's average
velocity for the one-hour trip? a) 45? north of
east b) 54? north of east c) 35? north of
east d) 27? north of east e) due east
13
4.3.3. While on a one-hour trip, a small boat
travels 32 km north and then travels 45 km east.
What is the direction of the boat's average
velocity for the one-hour trip? a) 45? north of
east b) 54? north of east c) 35? north of
east d) 27? north of east e) due east
14
4.3.4. Complete the following statement The
direction of the instantaneous velocity of a
particle is a) tangent to the path of the
particle. b) the same as the direction of the
average velocity vector. c) perpendicular to
the path of the particle. d) the same as the
direction of the acceleration of the
particle. e) perpendicular to the direction of
the acceleration of the particle.
15
4.3.4. Complete the following statement The
direction of the instantaneous velocity of a
particle is a) tangent to the path of the
particle. b) the same as the direction of the
average velocity vector. c) perpendicular to
the path of the particle. d) the same as the
direction of the acceleration of the
particle. e) perpendicular to the direction of
the acceleration of the particle.
16
4.3.5. A truck drives due south for 1.8 km in 2.0
minutes. Then, the truck turns and drives due
west for 1.8 km in 2.0 minutes. Which one of the
following statements is correct? a) The average
speed for the two segments is the same. The
average velocity for the two segments is the
same. b) The average speed for the two segments
is not the same. The average velocity for the
two segments is the same. c) The average speed
for the two segments is the same. The average
velocity for the two segments is not the
same. d) The average speed for the two segments
is not the same. The average velocity for the
two segments is not the same.
17
4.3.5. A truck drives due south for 1.8 km in 2.0
minutes. Then, the truck turns and drives due
west for 1.8 km in 2.0 minutes. Which one of the
following statements is correct? a) The average
speed for the two segments is the same. The
average velocity for the two segments is the
same. b) The average speed for the two segments
is not the same. The average velocity for the
two segments is the same. c) The average speed
for the two segments is the same. The average
velocity for the two segments is not the
same. d) The average speed for the two segments
is not the same. The average velocity for the
two segments is not the same.
18
4.4.1. Which of the following is not a
vector? a) position b) displacement c) average
velocity d) centripetal acceleration e) range
19
4.4.1. Which of the following is not a
vector? a) position b) displacement c) average
velocity d) centripetal acceleration e) range
20
4.4.2. Which one of the following quantities is
the change in objects velocity divided by the
elapsed time as the elapsed time becomes very
small? a) average velocity b) instantaneous
velocity c) average displacement d) average
acceleration e) instantaneous acceleration
21
4.4.2. Which one of the following quantities is
the change in objects velocity divided by the
elapsed time as the elapsed time becomes very
small? a) average velocity b) instantaneous
velocity c) average displacement d) average
acceleration e) instantaneous acceleration
22
4.4.3. How is the direction of the average
acceleration determined? a) The direction of
the average acceleration is the same as that of
the displacement vector. b) The direction of
the average acceleration is the same as that of
the instantaneous velocity vector. c) The
direction of the average acceleration is that of
the vector subtraction of the initial velocity
from the final velocity. d) The direction of
the average acceleration is the same as that of
the average velocity vector. e) The direction
of the average acceleration is that of the vector
addition of the initial velocity from the final
velocity.
23
4.4.3. How is the direction of the average
acceleration determined? a) The direction of
the average acceleration is the same as that of
the displacement vector. b) The direction of
the average acceleration is the same as that of
the instantaneous velocity vector. c) The
direction of the average acceleration is that of
the vector subtraction of the initial velocity
from the final velocity. d) The direction of
the average acceleration is the same as that of
the average velocity vector. e) The direction
of the average acceleration is that of the vector
addition of the initial velocity from the final
velocity.
24
4.5.1. A football is kicked at an angle 25? with
respect to the horizontal. Which one of the
following statements best describes the
acceleration of the football during this event if
air resistance is neglected? a) The
acceleration is zero m/s2 at all times. b) The
acceleration is zero m/s2 when the football has
reached the highest point in its trajectory. c)
The acceleration is positive as the football
rises, and it is negative as the football
falls. d) The acceleration starts at 9.8 m/s2
and drops to some constant lower value as the
ball approaches the ground. e) The acceleration
is 9.8 m/s2 at all times.
25
4.5.1. A football is kicked at an angle 25? with
respect to the horizontal. Which one of the
following statements best describes the
acceleration of the football during this event if
air resistance is neglected? a) The
acceleration is zero m/s2 at all times. b) The
acceleration is zero m/s2 when the football has
reached the highest point in its trajectory. c)
The acceleration is positive as the football
rises, and it is negative as the football
falls. d) The acceleration starts at 9.8 m/s2
and drops to some constant lower value as the
ball approaches the ground. e) The acceleration
is 9.8 m/s2 at all times.
26
4.5.2. A baseball is hit upward and travels along
a parabolic arc before it strikes the ground.
Which one of the following statements is
necessarily true? a) The velocity of the ball
is a maximum when the ball is at the highest
point in the arc. b) The x-component of the
velocity of the ball is the same throughout the
ball's flight. c) The acceleration of the ball
decreases as the ball moves upward. d) The
velocity of the ball is zero m/s when the ball is
at the highest point in the arc. e) The
acceleration of the ball is zero m/s2 when the
ball is at the highest point in the arc.
27
4.5.2. A baseball is hit upward and travels along
a parabolic arc before it strikes the ground.
Which one of the following statements is
necessarily true? a) The velocity of the ball
is a maximum when the ball is at the highest
point in the arc. b) The x-component of the
velocity of the ball is the same throughout the
ball's flight. c) The acceleration of the ball
decreases as the ball moves upward. d) The
velocity of the ball is zero m/s when the ball is
at the highest point in the arc. e) The
acceleration of the ball is zero m/s2 when the
ball is at the highest point in the arc.
28
4.5.3. Two cannons are mounted on a high cliff.
Cannon A fires balls with twice the initial
velocity of cannon B. Both cannons are aimed
horizontally and fired. How does the horizontal
range of cannon A compare to that of cannon
B? a) The range for both balls will be the
same b) The range of the cannon ball B is about
0.7 that of cannon ball A. c) The range of the
cannon ball B is about 1.4 times that of cannon
ball A. d) The range of the cannon ball B is
about 2 times that of cannon ball A. e) The
range of the cannon ball B is about 0.5 that of
cannon ball A.
29
4.5.3. Two cannons are mounted on a high cliff.
Cannon A fires balls with twice the initial
velocity of cannon B. Both cannons are aimed
horizontally and fired. How does the horizontal
range of cannon A compare to that of cannon
B? a) The range for both balls will be the
same b) The range of the cannon ball B is about
0.7 that of cannon ball A. c) The range of the
cannon ball B is about 1.4 times that of cannon
ball A. d) The range of the cannon ball B is
about 2 times that of cannon ball A. e) The
range of the cannon ball B is about 0.5 that of
cannon ball A.
30
4.5.4. Which one of the following statements
concerning the range of a football is true if the
football is kicked at an angle ? with an initial
speed v0? a) The range is independent of
initial speed v0. b) The range is only
dependent on the initial speed v0. c) The range
is independent of the angle?. d) The range is
only dependent on the angle?. e) The range is
dependent on both the initial speed v0 and the
angle?.
31
4.5.4. Which one of the following statements
concerning the range of a football is true if the
football is kicked at an angle ? with an initial
speed v0? a) The range is independent of
initial speed v0. b) The range is only
dependent on the initial speed v0. c) The range
is independent of the angle?. d) The range is
only dependent on the angle?. e) The range is
dependent on both the initial speed v0 and the
angle?.
32
4.5.5. Complete the following statement In
projectile motion, a) the horizontal motion
depends on the vertical motion. b) the vertical
motion depends on the horizontal motion. c) the
horizontal acceleration depends on the vertical
acceleration. d) the horizontal motion and the
vertical motion are independent of each
other. e) the vertical acceleration depends on
the horizontal acceleration.
33
4.5.5. Complete the following statement In
projectile motion, a) the horizontal motion
depends on the vertical motion. b) the vertical
motion depends on the horizontal motion. c) the
horizontal acceleration depends on the vertical
acceleration. d) the horizontal motion and the
vertical motion are independent of each
other. e) the vertical acceleration depends on
the horizontal acceleration.
34
4.5.6. An airplane is flying horizontally at a
constant velocity when a package is dropped from
its cargo bay. Assuming no air resistance, which
one of the following statements is correct? a)
The package follows a curved path that lags
behind the airplane. b) The package follows a
straight line path that lags behind the
airplane. c) The package follows a straight
line path, but it is always vertically below the
airplane. d) The package follows a curved path,
but it is always vertically below the
airplane. e) The package follows a curved path,
but its horizontal position varies depending on
the velocity of the airplane.
35
4.5.6. An airplane is flying horizontally at a
constant velocity when a package is dropped from
its cargo bay. Assuming no air resistance, which
one of the following statements is correct? a)
The package follows a curved path that lags
behind the airplane. b) The package follows a
straight line path that lags behind the
airplane. c) The package follows a straight
line path, but it is always vertically below the
airplane. d) The package follows a curved path,
but it is always vertically below the
airplane. e) The package follows a curved path,
but its horizontal position varies depending on
the velocity of the airplane.
36
4.6.1. A ball is launched with an initial
velocity as shown. Which one of the
following arrows best represents the direction of
the acceleration at point A? a) b) c) d) e)
The acceleration at point A is zero m/s2.
37
4.6.1. A ball is launched with an initial
velocity as shown. Which one of the
following arrows best represents the direction of
the acceleration at point A? a) b) c) d) e)
The acceleration at point A is zero m/s2.
38
4.6.2. A ball is launched with an initial
velocity as shown. Which one of the
following arrows best represents the direction of
the acceleration at point B? a) b) c) d) e)
The velocity at point B is zero m/s.
39
4.6.2. A ball is launched with an initial
velocity as shown. Which one of the
following arrows best represents the direction of
the acceleration at point B? a) b) c) d) e)
The velocity at point B is zero m/s.
40
4.6.3. A ball is launched with an initial
velocity as shown. Which one of the
following arrows best represents the direction of
the velocity at point C? a) b) c) d) e) The
velocity at point C is zero m/s.
41
4.6.3. A ball is launched with an initial
velocity as shown. Which one of the
following arrows best represents the direction of
the velocity at point C? a) b) c) d) e) The
velocity at point C is zero m/s.
42
4.6.4. A ball is launched with an initial
velocity as shown. Which one of the
following arrows best represents the direction of
the acceleration at point B? a) b) c) d) e)
The acceleration at point B is zero m/s2.
43
4.6.4. A ball is launched with an initial
velocity as shown. Which one of the
following arrows best represents the direction of
the acceleration at point B? a) b) c) d) e)
The acceleration at point B is zero m/s2.
44
4.6.5. A ball is launched with an initial
velocity as shown. Which one of the
following graphs best represents the horizontal
position, x, of the ball versus elapsed time?
45
4.6.5. A ball is launched with an initial
velocity as shown. Which one of the
following graphs best represents the horizontal
position, x, of the ball versus elapsed time?
46
4.6.6. A ball is launched with an initial
velocity as shown. Which one of the
following graphs best represents the vertical
position, y, of the ball versus elapsed time?
47
4.6.6. A ball is launched with an initial
velocity as shown. Which one of the
following graphs best represents the vertical
position, y, of the ball versus elapsed time?
48
4.6.7. A ball is launched with an initial
velocity as shown. Which one of the
following graphs best represents the y component
of the velocity of the ball versus elapsed time?
49
4.6.7. A ball is launched with an initial
velocity as shown. Which one of the
following graphs best represents the y component
of the velocity of the ball versus elapsed time?
50
4.6.8. A professional golfers club strikes a
ball on a tee and launches the ball at an angle
of 40?. Which one of the following statements
concerning the acceleration of the ball is true,
if the effects of air resistance are ignored? a)
While the ball is in the air, its acceleration
is zero m/s2. b) At the highest point of the
balls flight, its acceleration is
instantaneously equal to zero m/s2. c) As it is
rising, its acceleration decreases from 9.8 m/s2
to zero m/s2 at its highest point. d) The
acceleration is equal to (9.8 m/s2)(sin 40?)
6.3 m/s2. e) While the ball is in the air, its
acceleration is 9.8 m/s2.
51
4.6.8. A professional golfers club strikes a
ball on a tee and launches the ball at an angle
of 40?. Which one of the following statements
concerning the acceleration of the ball is true,
if the effects of air resistance are ignored? a)
While the ball is in the air, its acceleration
is zero m/s2. b) At the highest point of the
balls flight, its acceleration is
instantaneously equal to zero m/s2. c) As it is
rising, its acceleration decreases from 9.8 m/s2
to zero m/s2 at its highest point. d) The
acceleration is equal to (9.8 m/s2)(sin 40?)
6.3 m/s2. e) While the ball is in the air, its
acceleration is 9.8 m/s2.
52
4.7.1. A steel ball is tied to the end of a
string and swung in a vertical circle at constant
speed. Complete the following statement The
direction of the acceleration of the ball is
always a) perpendicular to the circle. b)
toward the center of the circle. c) tangent to
the circle. d) radially outward from the
circle. e) vertically downward.
53
4.7.1. A steel ball is tied to the end of a
string and swung in a vertical circle at constant
speed. Complete the following statement The
direction of the acceleration of the ball is
always a) perpendicular to the circle. b)
toward the center of the circle. c) tangent to
the circle. d) radially outward from the
circle. e) vertically downward.
54
4.7.2. A steel ball is tied to the end of a
string and swung in a vertical circle at constant
speed. Complete the following statement The
direction of the instantaneous velocity of the
ball is always a) perpendicular to the
circle. b) toward the center of the circle. c)
tangent to the circle. d) radially outward
from the circle. e) vertically downward.
55
4.7.2. A steel ball is tied to the end of a
string and swung in a vertical circle at constant
speed. Complete the following statement The
direction of the instantaneous velocity of the
ball is always a) perpendicular to the
circle. b) toward the center of the circle. c)
tangent to the circle. d) radially outward
from the circle. e) vertically downward.
56
4.7.3. A bicycle racer is traveling at constant
speed v around a circular track. The centripetal
acceleration of the bicycle is ac. What happens
to the centripetal acceleration of the bicycle if
the speed is doubled to 2v? a) The centripetal
acceleration increases to 4ac. b) The
centripetal acceleration decreases to 0.25
ac. c) The centripetal acceleration increases
to 2ac. d) The centripetal acceleration
decreases to 0.5ac. e) The centripetal
acceleration does not change.
57
4.7.3. A bicycle racer is traveling at constant
speed v around a circular track. The centripetal
acceleration of the bicycle is ac. What happens
to the centripetal acceleration of the bicycle if
the speed is doubled to 2v? a) The centripetal
acceleration increases to 4ac. b) The
centripetal acceleration decreases to 0.25
ac. c) The centripetal acceleration increases
to 2ac. d) The centripetal acceleration
decreases to 0.5ac. e) The centripetal
acceleration does not change.
58
4.7.4. A satellite orbits the Earth in uniform
circular motion. What is the direction of
centripetal acceleration of the satellite? a)
The centripetal acceleration is a scalar quantity
and it doesnt have a direction. b) The
centripetal acceleration vector points radially
outward from the Earth. c) The centripetal
acceleration vector points radially inward toward
the Earth. d) The centripetal acceleration
vector points in the direction of the satellites
velocity. e) The centripetal acceleration
vector points in the direction opposite that of
the satellites velocity.
59
4.7.4. A satellite orbits the Earth in uniform
circular motion. What is the direction of
centripetal acceleration of the satellite? a)
The centripetal acceleration is a scalar quantity
and it doesnt have a direction. b) The
centripetal acceleration vector points radially
outward from the Earth. c) The centripetal
acceleration vector points radially inward toward
the Earth. d) The centripetal acceleration
vector points in the direction of the satellites
velocity. e) The centripetal acceleration
vector points in the direction opposite that of
the satellites velocity.
60
4.7.5. A motorcycle travels at a constant speed
around a circular track. Which one of the
following statements about this motorcycle is
true? a) The car has a velocity vector that
points along the radius of the circle. b) The
car is characterized by constant velocity. c)
The car is characterized by constant
acceleration. d) The velocity of the car is
changing. e) The car has an acceleration vector
that is tangent to the circle at all times.
61
4.7.5. A motorcycle travels at a constant speed
around a circular track. Which one of the
following statements about this motorcycle is
true? a) The car has a velocity vector that
points along the radius of the circle. b) The
car is characterized by constant velocity. c)
The car is characterized by constant
acceleration. d) The velocity of the car is
changing. e) The car has an acceleration vector
that is tangent to the circle at all times.
62
4.7.6. A truck is traveling with a constant speed
of 15 m/s. When the truck follows a curve in the
road, its centripetal acceleration is 4.0 m/s2.
What is the radius of the curve? a) 3.8 m b)
14 m c) 56 m d) 120 m e) 210 m
63
4.7.6. A truck is traveling with a constant speed
of 15 m/s. When the truck follows a curve in the
road, its centripetal acceleration is 4.0 m/s2.
What is the radius of the curve? a) 3.8 m b)
14 m c) 56 m d) 120 m e) 210 m
64
4.7.7. If an object is moving in uniform circular
motion, its period is given by which one of the
following quantities? a) the speed of the
object b) the centripetal acceleration of the
object c) the number of revolutions the object
makes each second d) the time interval for the
object to make one revolution e) the
displacement of the object
65
4.7.7. If an object is moving in uniform circular
motion, its period is given by which one of the
following quantities? a) the speed of the
object b) the centripetal acceleration of the
object c) the number of revolutions the object
makes each second d) the time interval for the
object to make one revolution e) the
displacement of the object
66
4.7.8. When using the term uniform circular
motion, what do we mean by the term
uniform? a) The direction of the objects
velocity is constant. b) The net force on the
moving object is zero newtons. c) The forces
acting on the object are uniformly applied from
all directions. d) The motion occurs without
the influence of the gravitational force. e)
The motion of the object is at a constant speed.
67
4.7.8. When using the term uniform circular
motion, what do we mean by the term
uniform? a) The direction of the objects
velocity is constant. b) The net force on the
moving object is zero newtons. c) The forces
acting on the object are uniformly applied from
all directions. d) The motion occurs without
the influence of the gravitational force. e)
The motion of the object is at a constant speed.
68
4.7.9. For an object in uniform circular motion,
which of the following statements is false ? a)
The velocity of the object is constant. b) The
magnitude of the acceleration of the object is
constant. c) The acceleration is directed
radially inward. d) The magnitude of the
velocity is constant. e) The velocity is
directed in a direction that is tangent to the
circular path.
69
4.7.9. For an object in uniform circular motion,
which of the following statements is false ? a)
The velocity of the object is constant. b) The
magnitude of the acceleration of the object is
constant. c) The acceleration is directed
radially inward. d) The magnitude of the
velocity is constant. e) The velocity is
directed in a direction that is tangent to the
circular path.
70
4.8.1. At one point during the Tour de France
bicycle race, three racers are riding along a
straight, level section of road. The velocity of
racer A relative to racer B is the
velocity of A relative to C is
and the velocity of C relative to B is .
If 6.0 m/s, and 2.0 m/s, what
is ? a) 2.0 m/s b) 4.0 m/s c) 8.0
m/s d) ?4.0 m/s e) ?2.0 m/s
71
4.8.1. At one point during the Tour de France
bicycle race, three racers are riding along a
straight, level section of road. The velocity of
racer A relative to racer B is the
velocity of A relative to C is
and the velocity of C relative to B is .
If 6.0 m/s, and 2.0 m/s, what
is ? a) 2.0 m/s b) 4.0 m/s c) 8.0
m/s d) ?4.0 m/s e) ?2.0 m/s
72
4.8.2. Reference frame A is in motion with
respect to reference frame B. Complete the
following statement The speed of an object with
respect to reference frame A a) must be equal
to the speed of the object with respect to
reference frame B. b) must be less the speed of
the object with respect to reference frame B. c)
must be greater than the speed of the object
with respect to reference frame B. d) may or
may not be equal to the speed of the object with
respect to reference frame B. e) cannot be
equal to the speed of the object with respect to
reference frame B.
73
4.8.2. Reference frame A is in motion with
respect to reference frame B. Complete the
following statement The speed of an object with
respect to reference frame A a) must be equal
to the speed of the object with respect to
reference frame B. b) must be less the speed of
the object with respect to reference frame B. c)
must be greater than the speed of the object
with respect to reference frame B. d) may or
may not be equal to the speed of the object with
respect to reference frame B. e) cannot be
equal to the speed of the object with respect to
reference frame B.
74
4.8.3. Reference frame A is in motion with
respect to reference frame B. Complete the
following statement The velocity of an object
with respect to reference frame A a) must be
equal to the speed of the object with respect to
reference frame B. b) must be less the speed of
the object with respect to reference frame B. c)
must be greater than the speed of the object
with respect to reference frame B. d) may or
may not be equal to the speed of the object with
respect to reference frame B. e) cannot be
equal to the speed of the object with respect to
reference frame B.
75
4.8.3. Reference frame A is in motion with
respect to reference frame B. Complete the
following statement The velocity of an object
with respect to reference frame A a) must be
equal to the speed of the object with respect to
reference frame B. b) must be less the speed of
the object with respect to reference frame B. c)
must be greater than the speed of the object
with respect to reference frame B. d) may or
may not be equal to the speed of the object with
respect to reference frame B. e) cannot be
equal to the speed of the object with respect to
reference frame B.
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4.9.1. Two private airplanes are taxiing at a
small airport. Jim is in plane A rolling due
south with respect to the ground. Samantha is in
plane B rolling due west with respect to the
ground. Samantha is in front of Jim and to his
left. In what direction(s), relative to himself,
does Jim see Samanthas plane moving? a) due
east b) due west c) due south d) to the
south and to the east e) to the north and to
the west
77
4.9.1. Two private airplanes are taxiing at a
small airport. Jim is in plane A rolling due
south with respect to the ground. Samantha is in
plane B rolling due west with respect to the
ground. Samantha is in front of Jim and to his
left. In what direction(s), relative to himself,
does Jim see Samanthas plane moving? a) due
east b) due west c) due south d) to the
south and to the east e) to the north and to
the west