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Circular Motion

Total questions: 15

Worksheet time: 22mins

Name
Class
Date
1.

Bruno the bat has a mass of 0.58 kg and flies at a speed of 0.8 m/s in circle of radius 0.5 m. What is his acceleration?

a)

0.25 m/s2

b)

1.3 m/s2

c)

1.6 m/s2

d)

0.74 m/s2

2.
A particle P is moving in a circle with uniform speed. Which one of the following diagrams correctly shows the direction of the acceleration a and velocity v of the particle at one instant of time?
a)
A
b)
B
c)
C
d)
D
3.

The linear or tangential velocity is always _____

a)

parallel to the radius/acceleration.

b)

towards the center

c)

perpendicular to the radius/acceleration.

d)

away from the center

4.

A race car completes three laps of a circular track with a radius of 35 m in 9.0 seconds. Determine the speed of the car.

a)

3.9 m/s

b)

73.3 m/s

c)

24.4 m/s

d)

1.0 m/s

5.
Centripetal acceleration always points
a)
in the direction of the object's motion
b)
in the opposite direction of the object's motion
c)
towards the center of the circle
d)
towards the outside of the circle
6.

You swing a bucket of water attached to a string in a circle above your head. What keeps the water in the bucket?

a)

Friction

b)

Centripetal Force

c)

Gravity

d)

Inertia

7.

What is the source of centripetal force for planets in space?

a)

Inertia

b)

Tension

c)

Gravity

d)

Acceleration

8.

What is the source of centifugal force for planets in space?

a)

Inertia

b)

Tension

c)

Gravity

d)

Acceleration

9.

A ball on a string is spun around in a circle. Which of the following quantities is not constant?

a)

mass

b)

force

c)

velocity

d)

acceleration

10.

A 12 kg object undergoes circular motion with a radius of 4 m and a speed of 18 m/s. What is the centripetal acceleration of the object?

a)

1.125 m/s2

b)

81 m/s2

c)

4.5 m/s2

d)

36 m/s2

11.

The diagram shows an object traveling at a constant speed in a circular path. Which labeled arrow represents the centripetal force acting on the object?

a)

W

b)

Z

c)

X

d)

Y

12.
As mass increases, what happens to gravitational force?
a)
increases
b)
decreases
c)
stays the same
d)
i don't know
13.
As the distance between 2 objects increases, what happens to gravitational force?
a)
increases
b)
decreases
c)
stays the same
d)
i don't know
14.
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
15.
 2600 rev/min is equivalent to which of the following?
a)
2600 rad/s 
b)
43.3 rad/s 
c)
273 rad/s
d)
60 rad/s