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centripetal force

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.
A horse gallops around a circular arena.  The centripetal force on the horse is ___.
a)
directed outward
b)
tension
c)
directed toward the center of the arena
d)
9.8 N
2.
What relationship exists between the radius of a circle and the centripetal acceleration?
a)
direct
b)
inverse
c)
exponential
d)
inverse squared
3.
Which of the following is the unit for centripetal force?
a)
J
b)
m/s2
c)
kg⋅m/s
d)
N
4.
What is the relationship between centripetal force and the mass of an object?
a)
direct
b)
inverse
c)
exponential
d)
inverse squared
5.
Which of the following increase the centripetal force?
a)
Increasing the radius
b)
Increasing the velocity
c)
Decreasing the mass
d)
Decreasing the acceleration
6.
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
7.
When an object is in circular motion it is constantly changing its velocity.
a)
True
b)
False
8.
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
9.
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
10.

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

11.

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

12.

Why do sharp turns in roads have reduced speed limits posted?

a)

The lower the speed the lower centripetal force.

b)

The lower the speed the higher centripetal force.

c)

The lower the speed the larger the radius.

d)

Speed limits aren't reduced on sharp turns.

13.

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

14.

A bola is an old hunting instrument. If three rocks with a combined mass of 0.75 kg are spun at a speed of 20 m/s with a radius of 0.5 m, how much centripetal force is required to keep them spinning.

a)

600 N

b)

45 N

c)

30 N

d)

400 N

15.
When an object is in circular motion it is constantly changing its velocity.
a)
True
b)
False
16.

moving or tending to move toward a center...

a)

centripetal force

b)

centrifugal force

c)

Tangent

d)

Curvature

17.

Why does velocity happen when going in a circle even if you are going the same speed?

a)

The direction around the circle changes at every point.

b)

Velocity does not change

c)

Because direction is the same around the circle

d)

Neither

18.

If velocity increases force will....

a)

increase because they have a direct relationship

b)

increase because they have a inverse relationship

c)

decrease

d)

both

19.
Which of the following terms means "center seeking"?
a)
centrifugal
b)
centrifuge
c)
centripetal
d)
centenarian
20.
What happens to the centripetal force exerted on an object if you triple the velocity?
a)
it increases to 3X
b)
it decreases to 6X
c)
it increases to 6X
d)
it increases to 9X