Unit 2 Review

1

• Unit 2 Review
• Nonlinear Motion

2
A golf ball is given an initial speed of 20 m/s
and returns to level ground. Which launch angle
above level ground results in the ball traveling
the greatest horizontal distance? Neglect
friction. (A) 60 (B) 45 (C) 30 (D) 15
3
A golf ball is hit with an initial velocity of 15
m/s at an angle of 35 degrees above the
horizontal. What is the vertical component of the
golf balls initial velocity? (A) 8.6 m/s (C)
12 m/s (B) 9.8 m/s (D) 15 m/s
4
A golf ball is hit with an initial velocity of 15
meters per second at an angle of 35 degrees above
the horizontal. What is the horizontal component
of the golf balls initial velocity? (A) 8.6
m/s (B) 9.8 m/s (C) 12 m/s (D) 15 m/s
5
An airplane flies with a velocity of 750 km/hour,
30.0 south of east. What is the magnitude of the
eastward component of the planes velocity? (A)
866 km/h (B) 433 km/h (C) 650 km/h (D) 375
km/h
6
A motorboat, which has a speed of 5.0 m/s in
still water, is headed east as it crosses a river
flowing south at 3.3 m/s. What is the magnitude
of the boats resultant velocity with respect to
the starting point? (A) 3.3 m/s (B) 5.0 m/s
(C) 6.0 m/s (D) 8.3 m/s
7
A projectile launched at an angle of 45 above
the horizontal travels through the air. Compared
to the projectiles theoretical path with no air
friction, the actual trajectory of the projectile
with air friction is (A) lower and shorter (B)
lower and longer (C) higher and shorter (D)
higher and longer
8
A soccer player kicks a ball with an initial
velocity of 10 m/s at an angle of 30 above the
horizontal. The horizontal component of the
balls initial velocity is (A) 5.0 m/s (B)
8.7 m/s (C) 9.8 m/s (D) 10 m/s
9
Two stones, A and B, are thrown horizontally from
the top of a cliff. Stone A has an initial speed
of 15 meters per second and stone B has an
initial speed of 30 meters per second. Compared
to the time it takes stone A to reach the ground,
the time it takes stone B to reach the ground
is (A) the same (B) twice as great (C)
half as great (D) four times as great
10
A ball dropped from rest falls freely until it
hits the ground with a speed of 45 m/s. The
time during which the ball is in free fall is
approximately (A) 1 s (B) 2 s (C) 3 s (D)
5 s
11
A ball is thrown horizontally at a speed of 24
meters per second from the top of a cliff. If the
cliff is 125 m high, how much time elapses until
the ball hits the ground? (A) 2.0 s (B) 5.0
s (C) 6.2 s (D) 12.5 s
12
A ball is thrown horizontally at a speed of 24
meters per second from the top of a cliff. If the
cliff is 125 m high, how much far from the edge
of the cliff does the ball hit? (A) 24 m (B)
72 m (C) 120 m (D) 585 m
13
A golf ball is hit with an initial velocity of 50
m/s at an angle of 35 degrees above the
horizontal. What is the horizontal component of
the golf balls initial velocity?
14
A golf ball is hit with an initial velocity of 50
m/s at an angle of 35 degrees above the
horizontal. What is the vertical component of the
golf balls initial velocity?
15
A golf ball is hit with an initial velocity of 50
m/s at an angle of 35 degrees above the
horizontal. How much time does the ball does it
take to reach the maximum height?
16
A golf ball is hit with an initial velocity of 50
m/s at an angle of 35 degrees above the
horizontal. How high does it go?
17
A golf ball is hit with an initial velocity of 50
m/s at an angle of 35 degrees above the
horizontal. How long does it take to reach the
ground?
18
A golf ball is hit with an initial velocity of 50
m/s at an angle of 35 degrees above the
horizontal. How far does it go before hitting the
ground?
19
A 1200-kilogram car traveling at a constant
speed of 9.0 m/s turns at an intersection. The
car follows a horizontal circular path with a
radius of 25 meters to point P. At point P, the
car hits an area of ice and loses all frictional
force on its tires. Which path does the car
follow on the ice? A) A B) B C) C
D) D
20
A ball attached to a string is moved at
constant speed in a horizontal circular path.
A target is located near the path of the ball as
shown in the diagram. At which point along the
balls path should the string be released, if the
ball is to hit the target? A) A B) B
C) C D) D
21
An artificial satellite makes 4 complete
revolutions about the Earth in 8 hours. The
period of revolution of the satellite is A) ½
hour B) 2 hours C) 8 hours D) 32 hours
22
Centripetal AccelerationForce
23
If the velocity of a car traveling around a
circular track doubles, its centripetal
acceleration would be A) 1/2 as great B) 2 times
greater C) 1/4 as great D) 4 times greater
24
The diagram below shows the elliptical orbit of a
comet around the Sun. The magnitude of the
centripetal acceleration of the comet is greatest
at point A) A B) B C) C D) D
25
A car moves with a constant speed in a
clockwise direction around a circular path of
radius r, as represented in the diagram above.
When the car is in the position shown, its
acceleration is directed toward the A) north B)
west C) south D) east
26
The magnitude of the centripetal force acting on
an object traveling in a horizontal, circular
path will decrease if the A) radius of the path
is increased B) mass of the object is
increased C) direction of motion of the object is
reversed D) speed of the object is
increased
27
The diagram below represents a mass, m, being
swung clockwise at constant speed in a
horizontal circle. At the instant shown, the
centripetal force acting on mass m is directed
toward point A) A B) B C) C D) D
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• A 0.50-kilogram object moves in a horizontal
  circular path with a radius of 0.25 meter at a
  constant speed of 4.0 m/s. What is the magnitude
  of the objects acceleration?
• A) 8.0 m/s2
• B) 16 m/s2
• C) 32 m/s2
• D) 64 m/s2