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Circular Motion & Gravitation

Total questions: 10

Worksheet time: 19mins

Name
Class
Date
1.

Centripetal force, created by swinging something in a circle, acts in a direction--

a)

along the path of motion

b)

away from the center of the circle

c)

toward the center of the circle

d)

tangent to the circle

2.

A 10kg car travels at a constant speed of 20.0 m/s around a horizontal circular track. Which diagram correctly represent the direction of the car's velocity (v) and the direction of the centripetal force (Fc) acting on the car at a particular moment?

a)
b)
c)
d)
3.
What is the difference between centripetal and centrifugal forces?
a)
Centripetal is towards center while centrifugal is away from the center.
b)
Centrifugal is towards center while centripetal is away from the center.
c)
Neither of the above is correct
4.
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
5.

At point P, he car hits an area of ice and loses all frictional force on it tires. Which path does the car follow on the ice?

a)

A

b)

B

c)

C

d)

D

6.
Assuming Andromeda rotates at a uniform rate, which stars are moving the fastest?
a)
Stars closest to center
b)
Stars furthest from the center
c)
Stars with the hottest temperature
d)
Stars with the coldest temperature
7.

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

8.

Two masses 8000 kg and 1500 kg are 1.5 m apart. Find their gravitational pull.

a)

3 N

b)

0.0003 N

c)

3000 N

d)

30 N

9.
If the orginal force of gravity is 100 N and the distance is doubled then the force of gravity is
a)
200
b)
50
c)
400
d)
25
10.

a car going around a curve - identify the centripetal force:

a)

friction

b)

tension

c)

force normal

d)

force weight