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Circular Motion

Total questions: 24

Worksheet time: 26mins

Name
Class
Date
1.

How is acceleration seen in circular motion?

a)

Velocity increases as the object travels in a circle.

b)

Velocity decreases as the object travels in a circle.

c)

The object changes direction as it travels in a circle.

d)

There is no acceleration as an object travels in a circle.

2.

What is the best definition of acceleration?

a)

When an object speeds up.

b)

When an object slows down.

c)

When an object speeds up or slows down.

d)

When an object changes velocity.

3.

As the car goes around the curve, the centripetal force is directed--

a)

toward the center of the circular curve

b)

away from the center of the circular curve

c)

tangent to the curve in the direction of motion

d)

tangent to the curve opposite the direction of motion

4.
The force that is necessary to keep the bucket swinging in a circle is called the:
a)
tangential velocity
b)
centrifugal force
c)
centripetal force
d)
the force of gravity
5.
In torque, which arrow provides the Fc ?
a)
The downward arrow
b)
The red arrow
c)
The blue arrow
d)
The upward arrow
6.
A pilot experiences centripetal acceleration of 2g's while maneuvering a loop at a speed of 400 m/s.  What is the radius of the loop?
a)
203 m
b)
8163 m
c)
80,003 m
d)
23 m
7.
Calculate the velocity of an object moved around a circle with a radius of 1.65 m and an acceleration of 3.5 m/s2.
a)
2.4 m/s
b)
3.6 m/s
c)
3.9 m/s
d)
4.2 m/s
8.
Which represents the acceleration of the ball?
a)
A
b)
B
c)
C
d)
D
9.
Objects moving with constant speed in a circular path experience
a)
constant motion
b)
linear acceleration
c)
angular acceleration
d)
centripetal acceleration
10.
What states that "every object in the universe attracts every other object"?
a)
Law of Universal Gravitation
b)
Newton's First Law of Motion
c)
My mother
d)
Inertia & gravity
11.
Luke Skywalker has a mass of 13 kg and weight of 127.4 N on earth. Find his weight on the Endor moon. Acceleration due to gravity of 2 m/s/s.
a)
254.8 N
b)
13 kg
c)
26 N
d)
127.4 kg
12.
An object has a weight of 12N on the Earth.  It is placed on the moon, where gravity is (1/6) as strong as on the Earth.  What is its weight on the moon?
a)
2 N
b)
72 N
c)
6 N
d)
18 N
13.
If I double the distance between two objects, what happens to their gravitational Force?
a)
4x bigger
b)
4x smaller
c)
2x bigger
d)
2x smaller
14.
Bruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration?
a)
0.25 ms-2
b)
0.5 ms-2
c)
1 ms-2
d)
2 ms-2
15.
What is the direction of the velocity at point B, if the ball is revolving clockwise?
a)
up
b)
right
c)
down
d)
left
16.
What is the direction of the acceleration at point A, if the ball is revolving clockwise?
a)
up
b)
right
c)
down
d)
left
17.
1.  You are making a circular turn in your car on a horizontal road when you hit a big patch of ice, causing the force of friction between the tires and the road to become zero. While the car is on the ice, it
a)
A)  moves along a straight-line path away from the center of the circle.
b)
A)  moves along a straight-line path toward the center of the circle.
c)
A)  moves along a straight-line path in its original direction.
d)
A)  continues to follow a circular path, but with a radius larger than the original radius.
18.
What is the Universal law of gravitation equation? 
a)
G=F ⋅ m⋅m2/r2
b)
F=G ⋅ m⋅m2/(r)2
c)
F=G ⋅ r2/m⋅m2
d)
G=F ⋅ r2/m⋅m2
19.
Two objects are attracted to each other with 36 N of gravitational force.
What would the force between them be if one of the masses were doubled?
a)
9
b)
18
c)
72
d)
144
20.
You are moving a ball in a circle using 72 N of centripetal force. What would the force be if you doubled the radius of the circle.
a)
18 N
b)
36 N 
c)
72 N
d)
144 N
21.
What is the velocity of the car?
a)
4.4 m/s
b)
27.9 m/s
c)
37.6 m/s
d)
89 m/s
22.
Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.
a)
10 N
b)
20 N
c)
30 N
d)
40  N
23.
Two asteroids exert a gravitational force, F, on each other. Some time later, the asteroids are now three times as far from each other as before. Which of the following represents the gravitational force at this distance? 
a)
F/3
b)
F/2
c)
F/6
d)
F/9
24.

Two spherical objects have equal masses and experience a gravitational force of 25 N towards one another. Their centers are 36 cm apart. Determine each of their masses. NOTE: r is given in cm and MUST be converted to meters!!!

a)

2.2 X 105 kg

b)

1.44 kg

c)

2.2 X 101 kg

d)

4.8 X 1010 kg

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