Circular%20Motion

1
Circular Motion
2
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
3
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
4
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
5
Centripetal AccelerationForce
6
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
7
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
8
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
9
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
10
The centripetal force acting on the space shuttle
as it orbits Earth is equal to the shuttles A)
inertia B) momentum C) velocity D) weight
11
Centripetal force Fc acts on a car going around a
curve. If the speed of the car were twice as
great, the magnitude of the centripetal force
necessary to keep the car moving in the same path
would be A) Fc B) 2Fc C) Fc/2 D)
4Fc
12
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
13

• 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

14

• 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 centripetal force?

15
A 0.40-kilogram stone is attached to a string.
The stone is moving at a constant speed of 4.0
m/s in a horizontal circle with a radius of 0.80
m. The magnitude of the centripetal acceleration
of the stone is A) 0.0 m/s2 B) 2.0 m/s2 C) 5.0
m/s2 D) 20. m/s2
16
A 2.0 103-kilogram car travels at a constant
speed of 12 m/s around a circular curve of radius
30 meters. What is the magnitude of the
centripetal acceleration of the car as it goes
around the curve? A) 0.40 m/s2 B) 4.8 m/s2 C)
800 m/s2 D) 9,600 m/s2
17
In an experiment, a 0.028-kilogram rubber
stopper is attached to one end of a string. A
student whirls the stopper overhead in a
horizontal circle with a radius of 1.0 meter.
The stopper completes 10 revolutions in 10
seconds. Calculate the magnitude of the angular
speed or frequency of the stopper.
18
In an experiment, a 0.028-kilogram rubber
stopper is attached to one end of a string. A
student whirls the stopper overhead in a
horizontal circle with a radius of 1.0 meter.
The stopper completes 10 revolutions in 10
seconds. Calculate the magnitude of the linear or
tangential speed of the whirling stopper.
19
In an experiment, a 0.028-kilogram rubber
stopper is attached to one end of a string. A
student whirls the stopper overhead in a
horizontal circle with a radius of 1.0 meter.
The stopper completes 10 revolutions in 10
seconds. Calculate the magnitude of the
centripetal acceleration of the whirling stopper.
20
In an experiment, a 0.028-kilogram rubber
stopper is attached to one end of a string. A
student whirls the stopper overhead in a
horizontal circle with a radius of 1.0 meter.
The stopper completes 10 revolutions in 10
seconds. Calculate the magnitude of the
centripetal force on the whirling stopper.
21
A mass of 10 kilograms is revolving at a linear
speed of 5 meters per second in a circle with a
radius of 10 meters. What is the frequency or
angular speed (rps) of the mass?
22
A mass of 10 kilograms is revolving at a linear
speed of 5 meters per second in a circle with a
radius of 10 meters. What is the centripetal
acceleration of the mass is
23
A mass of 10 kilograms is revolving at a linear
speed of 5 meters per second in a circle with a
radius of 10 meters. The centripetal force acting
on the mass is A) 5 N C) 20 N B) 10 N D) 25 N
24
A 1750-kilogram car travels at a constant speed
of 15.0 m/s around a horizontal, circular track
with a radius of 45.0 meters. The magnitude of
the centripetal acceleration of the car is
25
A 1750-kilogram car travels at a constant speed
of 15.0 m/s around a horizontal, circular track
with a radius of 45.0 meters. The magnitude of
the centripetal force acting on the car is
26
Universal Gravitational Laws
27
As the distance between two objects increases,
the gravitational force of attraction between
them will A) decrease B) increase C) remain the
same
28

• The diagram below
• Shows four
• different locations
• of a satellite in its
• elliptical orbit about Earth. At which location
  is the magnitude of the satellites velocity
  greatest?
• A B) B C) C D) D

29
Spacecraft S is traveling from planet P1 toward
planet P2 At the position shown, the magnitude
of the gravitational force of planet P1 on the
spacecraft is equal to the magnitude of the
gravitational force of planet P2 on the
spacecraft. If distance X is greater than
distance Y, then the mass of P1 must be A) less
than the mass of P2 B) greater than the mass of
P2 C) equal to the mass of P2
30
The diagram below shows the movement of a planet
around the Sun. Area 1 equals area 2. Compared
to the time the planet takes to move from C to
D, the time it takes to move from A to B is A)
less B) greater C) the same
31
A satellite is in geosynchronous orbit. Compared
to Earths period of rotation, the satellites
period of revolution is A) less B) greater C)
the same
32
The shapes of the paths of the planets about the
Sun are all A) circles with the Sun at the
center B) circles with the Sun off center C)
ellipses with the Sun at the center D) ellipses
with the Sun at one focus
33
Base your answer to the following question on
the diagram below which represents the orbit
of a comet about the Sun. As the comet moves from
point A to point B, its potential energy A)
decreases C) remains the same B) increases
34
The comet Hyakutake, seen in the Earth's sky in
1996, will take more than 10,000 years to
complete its orbit. Which object is at a focus of
the comet's orbit? A) Earth B) Sun C) Moon D)
Jupiter
35
As the planet moves from point B to point C, how
do its kinetic energy and potential energy
change? A) Its kinetic energy decreases, and
its potential energy decreases. B) Its
kinetic energy decreases, and its
potential energy increases. C) Its kinetic energy
increases, and its potential energy
decreases. D) Its kinetic energy increases, and
its potential energy increases.
36
What is the magnitude of the gravitational force
between two 5.0-kilogram masses separated by a
distance of 5.0 meters? A) 5.0 10 0 N B) 3.3
10 10 N C) 6.7 10 11 N D) 1.3 10 11 N
37
An astronaut weighs 8.00 102 Newton on the
surface of Earth. What is the weight of the
astronaut 6.37 106 meters above the surface of
Earth (2 radii total)? A) 0.00 N B) 2.00 102
N C) 1.60 103 N D) 3.20 103 N