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Quantities of Circular Motion

Total questions: 21

Worksheet time: 2hrs 3mins

Name
Class
Date
1.

A yo-yo is whirled on a string, then the string breaks. What causes the yo-yo to move off in a straight line?

a)

centrifugal force

b)

centripetal force

c)

inertia

d)

centripetal acceleration

2.

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

3.

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

4.

The number of complete revolutions per second is:

a)

frequency

b)

period

c)

torque

d)

rotational inertia

5.

The time required for one complete revolution is:

a)

torque

b)

frequency

c)

period

d)

rotational kinetic energy

6.

The drum of a washing machine rotates 1800 times in 3 minutes. What is the period?

a)

0.1 s

b)

0.2 s

c)

0.3 s

d)

0.5 s

7.

What is the velocity formula for uniform circular motion?

a)
b)
c)
d)
8.

What's the centripetal acceleration of a .2 kg yoyo spun in a circle with a radius of .7 meters at a velocity of 3 m/s?

a)

8.23 m/s2

b)

10.54 m/s2

c)

12.86 m/s2

d)

17.39 m/s2

9.
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
10.
What is 5π/6 radians in degrees?
a)
180
b)
150
c)
360
d)
120
11.
What is 7π/4 radians in degrees?
a)
300
b)
135
c)
315
d)
45
12.
What is 240 degrees in radians? 
a)
π/3
b)
4π/3
c)
5π/3
d)
2π/3
13.
What is 225  degrees in radians? 
a)
7π/4
b)
5π/4
c)
3π/4
d)
5π/3
14.
What is 0 degrees in radians? 
a)
2π 
b)
0
c)
π
d)
 π/2
15.
What is 270 degrees in radians? 
a)
π/4
b)
3π/2
c)
3π/4
d)
π/2
16.

Convert 510o to Radians

a)

25π / 3

b)

23π / 8

c)

17π / 6

d)

51π / 8

17.

Convert -520o into Radians

a)

-17π / 4

b)

-21π / 6

c)

-26π / 9

d)

-23π / 6

18.

Convert -40o into Radians

a)

-4π / 8

b)

-8π / 9

c)

-2π / 9

d)

-5π / 8

19.

Convert -41π / 12 radians into degrees

a)

-600o

b)

-605o

c)

-610o

d)

-615o

20.
What is 90 degrees in radians? 
a)
π/4
b)
π/2
c)
π/6
d)
3π/2
21.
Convert π radians to degrees.
a)
90⁰
b)
180⁰
c)
360⁰
d)
60⁰