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Centripetal force Quiz 2

Total questions: 41

Worksheet time: 33mins

Name
Class
Date
1.
Which of the following is the unit for centripetal force?
a)
J
b)
m/s2
c)
kg⋅m/s
d)
N
2.
What is the relationship between centripetal force and the mass of an object?
a)
direct
b)
inverse
c)
exponential
d)
inverse squared
3.
Which of the following increase the centripetal force?
a)
Increasing the radius
b)
Increasing the velocity
c)
Decreasing the mass
d)
Decreasing the acceleration
4.
When an object is in circular motion it is constantly changing its velocity.
a)
True
b)
False
5.
The centripetal force of satellites is similar to gravitational force because they are both a net force towards the center of earth.
a)
True
b)
False
6.
If centripetal force stopped acting on all satellites they would continue traveling in space in a constant direction and constant speed.
a)
True
b)
False
7.
Decreasing the radius when making a turn allows you to____?
a)
Increase your friction
b)
Keep a high speed
c)
Change your inertia
d)
Decrease gravitational pull
8.

A car is rounding a bend as shown in the diagram. Which arrow correctly shows the direction of the cars velocity?

a)

A

b)

B

c)

C

d)

D

9.

A car is rounding a curve as shown in the diagram. Which arrow correctly shows the direction of the centripetal force keeping the car in circular motion?

a)

A

b)

B

c)

C

d)

D

10.

In the diagram of the car, if the driver took his hands off the steering wheel, which arrow correctly shows the direction the car would travel in?

a)

A

b)

B

c)

C

d)

D

11.

If car A and car B are both traveling at the same speed, which will require a higher centripetal force?

a)

Car A

b)

Car B

c)

They have the same centripetal force

12.

An engineer is planning a road with a turn. If the speed limit is 20 m/s and the centripetal acceleration cannot exceed 8.5 m/s/s, how big must the radius of the turn be?

a)

2.4 m

b)

47 m

c)

170 m

d)

3400 m

13.
Calculate the amount of centripetal force it takes for a softball pitcher to rotate a ball with a velocity of 3 m/s if the ball weighs .12 kg and her arm is .65 meters long.
a)
.38
b)
1.23
c)
.55
d)
1.66 N
14.

centripetal force arises from a combination of other forces acting on an object

a)

T

b)

F

15.
Calculate the amount of centripetal force it takes for a softball pitcher to rotate a ball with a velocity of 3 m/s if the ball weighs .12 kg and her arm is .65 meters long.
a)
.38
b)
1.23
c)
.55
d)
1.66 N
16.
A car with mass m travels around a curve with velocity v. What do you know about the centripetal force if the radius triples?
a)
9.8?
b)
Force triples
c)
Force divides by 3
d)
Force divides by 9
17.
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
18.
The time taken for one complete circuit is called the... 
a)
Period
b)
Frequency 
c)
Angular velocity
19.
Which of the following increase the centripetal force?
a)
Increasing the radius
b)
Increasing the velocity
c)
Decreasing the mass
d)
Decreasing the acceleration
20.
When an object is in circular motion it is constantly changing its velocity.
a)
True
b)
False
21.
As the moon orbits the earth, what keeps the moon moving in a circular motion?
a)
Gravity
b)
Inertia
c)
Centripetal Force
d)
Friction
22.
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
23.
Where is the net force when the rollercoaster is at the top of the loop?
a)
Towards the sky
b)
Towards the Right
c)
Towards the left
d)
Towards the ground
24.
If centripetal force stopped acting on all satellites they would continue traveling in space in a constant direction and constant speed.
a)
True
b)
False
25.
The centripetal force of satellites is similar to gravitational force because they are both a net force towards the center of earth.
a)
True
b)
False
26.

What is the equation to calculate the centripetal force for an object?

a)

F = mT

b)

F = mv2/r

c)

F = mu mg

d)

F = mg

27.

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

28.
A ball on a string is travelling in circular motion. Which vector represents the centripetal force?
a)
The green vector because it points towards the center of the circular path
b)
The blue vector because it shows the direction of the object's inertia
c)
The green vector because it shows the path of the ball
d)
The blue vector because this is the way the ball will move when it is released.
29.
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
30.
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
31.
Which of the following units is used for tangential velocity?
a)
m/s2
b)
N
c)
J
d)
m/s
32.
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
33.
If centripetal force stopped acting on all satellites they would continue traveling in space in a constant direction and constant speed.
a)
True
b)
False
34.

A 25kg boy is riding a merry-go-round with a radius of 5 m. What is the centripetal force on the boy if his velocity is 6 ms-1?

a)

180 N

b)

150 N

c)

120 N

d)

245 N

35.
Where is the net force when the rollercoaster is at the top of the loop?
a)
Towards the sky
b)
Towards the Right
c)
Towards the left
d)
Towards the ground
36.
Which of the following increase the centripetal force?
a)
Increasing the radius
b)
Increasing the velocity
c)
Decreasing the mass
d)
Decreasing the acceleration
37.

moving or tending to move toward a center...

a)

centripetal force

b)

centrifugal force

c)

Tangent

d)

Curvature

38.
When an object is in circular motion it is constantly changing its velocity.
a)
True
b)
False
39.

What's the centripetal acceleration of an object traveling 2.3 m/s around a circle of diameter 0.6 m?

a)

5 m/s2

b)

17.63 m/s2

c)

10 m/s2

d)

8.81 m/s2

40.

1) True or False: If the speed of an object in circular motion remains constant, there is no acceleration.

a)

True

b)

False

41.

1. In the drawing a rubber ball tied to a string is twirled in a circular path. What force is providing the centripetal acceleration on the ball?

a)

Gravity force from the earth

b)

Tension from the string

c)

Normal force on the ball

d)

Friction force from the string

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