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Circular Motion

Total questions: 35

Worksheet time: 40mins

Name
Class
Date
1.

Which vector represents the direction of the acceleration of a ball traveling in a circular path?

a)

A

b)

B

c)

C

d)

D

2.

Which of the following vectors depict the velocity of a ball traveling in a circular path?

a)

A

b)

B

c)

C

d)

D

3.
Two objects are attracted to each other with 36 N of gravitational force.
What would the force between them be if the distance between them were doubled?
a)
9
b)
18
c)
72
d)
144
4.

Two objects are attracted to each other with 36 N of gravitational force.

What would the force between them be if the distance between them was reduced to half its original distance?

a)

9

b)

18

c)

72

d)

144

5.
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
6.
Two objects are attracted to each other with 36 N of gravitational force.
What would the force between them be if both of the masses were doubled?
a)
9
b)
18
c)
72
d)
144
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.
Calculate the mass of an object if it took 20 N to rotate it in a circle with a radius of 2 meters with a velocity of 4 m/s
a)
4.1 kg
b)
3.6 kg
c)
2.5 kg
d)
1.8 kg
9.
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
10.

What's the acceleration of gravity of a planet with a mass of 1 x 1025 kg and a radius of 5x106 meters?

a)

.267 m/s2

b)

2.67 m/s2

c)

26.7 m/s2

d)

267 m/s2

11.

Two object each have masses of 9 x 106 kg and are 1 meter apart from each other. What's the force of gravity between them?

a)

5402 N

b)

6320 N

c)

7541 N

d)

7945 N

12.

What's the centripetal acceleration of a 0.2 kg yoyo spun in a circle with a radius of 0.7 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

13.

What's the centripetal force of a 0.2 kg yoyo spun in a circle with a radius of 0.7 meters at a velocity of 3 m/s?

a)

2.05 N

b)

2.57 N

c)

2.90 N

d)

3.13 N

14.
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
15.

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

16.
Which of the following is the unit for centripetal force?
a)
J
b)
m/s2
c)
kg⋅m/s
d)
N
17.

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)
18.
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
19.
The time taken for one complete circuit is called the... 
a)
Period
b)
Frequency 
c)
Angular velocity
20.

Is it possible for an object moving with a constant speed to accelerate?  Explain. 
A) No, if the speed is constant then the acceleration is equal to zero.  

B) No, an object can accelerate only if there is a net force acting on it.  
C) Yes, although the speed is constant, the direction of the velocity can be changing.  
D) Yes, if an object is moving it can experience acceleration 

a)
A
b)
B
c)
C
d)
D
21.
Which one of the following statements concerning the two “gravitational constants” G, the universal constant,  and g the magnitude of the acceleration due to the gravity is true? 
a)
The value for G and g do not depend on location. 
b)
The value of G is the same everywhere in the universe, but the value of g is not. 
c)
The value of G and g are equal on the surface of any planet, but in general, vary with location in the universe. 
22.

A pilot experiences centripetal acceleration of 2g's (2 x 9.8 m/s2) 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

23.
Planets orbit the Sun in a shape called a(n)
a)
circle
b)
ellipse
c)
focus
d)
perihelion
24.

Where would the planet be moving fastest?

a)
Position A to B
b)
Position B to C
c)
Position H to I
d)
Position I to J
25.

What is true about the area between points A-B and the Sun, and the area between points H-I and the Sun?

a)
The area between A, B and the Sun is the largest.
b)
The area between H, I and the Sun is the largest
c)
Both areas are equal in size
d)
There is not enough information to determine the areas
26.
Complete the following statement: The farther away two planets are the _______ the gravitational force between them.
a)
greater
b)
same
c)
zero
d)
less
27.

Which would have the greater linear velocity the outer horse on a carousel or the inner?

a)

Outer

b)

Inner

c)

Both have the same velocity

d)

Depends on the mass of the horse

28.

Why do the inner horse and outer horse have different velocities?

a)

The outer horse has to travel a greater distance in the same amount time as the inner

b)

This is untrue the inner horse travels faster because it it does not have as far to go as the outer

c)

This is not true. The horses travel at the same speed because they are connected on the carousel.

d)

The outer horses are smaller so they can travel faster.

29.

Which of the following planets has the greatest orbital period?

a)

Mars

b)

Earth

c)

Venus

d)

Mercury

30.

A hamster runs on his wheel causing it spin around 10 times every 2.5 seconds. What is the frequency of the wheel?

a)

0.25 Hz

b)

4 Hz

c)

25 Hz

d)

Not enough information

31.

The formula to determine circumference is:

a)

2πr2\pi r

b)

πr2\pi r^2

c)

12 bh\frac{1}{2\ }bh

d)

43πr3\frac{4}{3}\pi r^3

32.
Calculate the mass of an object if it took 20 N to rotate it in a circle with a radius of 2 meters with a velocity of 4 m/s
a)
4.1 kg
b)
3.6 kg
c)
2.5 kg
d)
1.8 kg
33.
Force of gravity is directly proportional to
a)
Mass
b)
Weight
c)
Distance
d)
Time
34.
__________holds all of the planets in orbit around the sun.
a)
Force
b)
Motion
c)
Weight
d)
Gravity
35.
Force of gravity is inversely proportional to
a)
Mass
b)
Weight
c)
Distance
d)
Time

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