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Circular Motion
Class:
Name:
1.
Date:
What is the magnitude of the centripetal
acceleration of a 4-kilogram mass
orbiting at 10 meters per second with a
radius of 2 meters?
(1) 5 m/sec2
(3)
2.
80 m/sec2
4.
(4)
(2) increase
200 m/sec2
(3) remain the same
In the diagram shown, satellite S moves
in a circular orbit around the Earth (E).
The direction of the acceleration of the
satellite is toward point
(1) A
(2) B
(3) C
5.
(4) D
A student using a stopwatch nds that
the time for 10 complete orbits of a ball
on the end of a string is 25 seconds.
The period of the orbiting ball is
(1) 25 sec
(2) 2.0 sec
(3) 2.5 sec
(4) 5.0 sec
As the radius of an orbiting satellite is
decreased, the speed required to keep it
in orbit will have to
(1) decrease
(2) 50 m/sec2
6.
3.
__________
An object traveling with uniform circular
motion has a centripetal acceleration due
to the change in
(1) speed
(2) direction
(3) kinetic energy
(4) mass
The diagram here represents a mass of
1.0 kilogram traveling at 8.0 meters
per second in a circular path of radius
4.0 meters.
What is the centripetal acceleration of
the object?
page 1
(1) 10 m/sec2
(2) 2.0 m/sec2
(3) 16 m/sec2
(4) 4.0 m/sec2
7.
If the mass of the object is doubled, the
magnitude of the centripetal force will be
9.
(1) one-half as much
(1)
(2) twice as much
1
2
as great
(2) 2 times greater
(3) one-fourth as much
(3)
(4) four times as much
8.
If the velocity of a car traveling around
a circular track doubles, its centripetal
acceleration would be
1
4
as great
(4) 4 times greater
If object O is moving in a uniform
circular motion around point P at
constant speed, which vector shown
represents a centripetal force?
10.
(1)
(2)
An object on the end of a string rotates
clockwise in a circle as shown in the
diagram. If the string breaks when the
object is at point X, which arrow below
best represents the path of the object
after the string has broken?
(1)
(2)
(3)
(3)
(4)
(4)
Class: __________
page 2
Circular Motion
11.
12.
A motorcycle of mass 100 kilograms
travels around a at, circular track of
radius 10 meters with a constant speed
of 20 meters per second. What force is
required to keep the motorcycle moving
in a circular path at this speed?
(1) 200 N
(2) 400 N
(3) 2000 N
(4) 4000 N
13.
While the object is undergoing uniform
circular motion, its acceleration
(1) has a magnitude of zero
(2) increase in magnitude
(3) is directed toward the center of the
circle
(4) is directed away from the center of
the circle
14.
The diagram shows an object with a
mass of 1.0 kilogram attached to a string
0.50 meter long. The object is moving
at a constant speed of 5.0 meters per
second in a horizontal circular path with
center at point O.
If the string is cut when the object is at
the position shown, the path the object
will travel from this position will be
(1) toward the center of the circle
(2) a curve away from the circle
(3) a straight line tangent to the circle
15.
What is the magnitude of the centripetal
force acting on the object?
If the string is lengthened while the
speed of the object remains constant, the
centripetal acceleration of the object will
(1) 2.5 N
(2) 10 N
(1) decrease
(3) 25 N
(4) 50 N
(2) increase
(3) remain the same
Class: __________
page 3
Circular Motion
16.
The diagram shows a 2.0-kilogram model
airplane attached to a wire. The airplane
is ying clockwise in a horizontal circle
of radius 20 meters at 30 meters per
second.
18.
The centripetal force acting on the
airplane at the position shown is directed
toward point
(1) A
(2) B
(3) C
What is the magnitude of the frictional
force that keeps the vehicle on its circular
path?
(4) D
19.
17.
What is the magnitude of the centripetal
acceleration of the airplane?
(1) 0 m/s2
(2) 1.5 m/s2
(3) 45 m/s2
(4) 90 m/s2
Class: __________
A vehicle travels at a constant speed
of 6.0 meters per second around a
horizontal circular curve with a radius of
24 meters. The mass of the vehicle is
4:4 103 kilograms. An icy patch is
located at P on the curve.
page 4
(1) 1:1
103 N
(2) 6:6
103 N
(3) 4:3
104 N
(4) 6:5
104 N
On the icy patch of pavement, the
frictional force on the vehicle is zero.
Which arrow best represents the direction
of the vehicle's velocity when it reaches
icy patch P ?
(1)
(2)
(3)
(4)
Circular Motion
20.
A 60-kilogram adult and a 30-kilogram
child are passengers on a rotor ride at
an amusement park. When the rotating
hollow cylinder reaches a certain constant
speed, v, the oor moves downward.
Both passengers stay “pinned” against
the wall of the rotor, as shown in the
diagram.
21.
Compared to the magnitude of the
acceleration of the adult, the magnitude
of the acceleration of the child is
(1) less
(2) greater
(3) the same
The magnitude of the frictional force
between the adult and the wall of
the spinning rotor is F. What is the
magnitude of the frictional force between
the child and the wall of the spinning
rotor?
(1) F
Class: __________
(2) 2F
(3)
F
2
(4)
F
4
page 5
Circular Motion
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Class: __________
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Answer:
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Answer:
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2
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4
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Answer:
3
Circular Motion
06/25/2013