Centripetal Acceleration/Force & Gravitation Forces

Which represents the acceleration of the ball?

• A
• B
• C
• D

The force that is necessary to keep the bucket swinging in a circle is called the:

• tangential velocity
• centrifugal force
• centripetal force
• the force of gravity

Which of the following depict the tangential velocity of the ball?

• A

• B

• C

• D

The velocity is always _____ to the line of a circle. 

• outwards
• towards the center
• tangent
• faster

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

• B

• C

• D

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

• B

• C

• D

The amount of attraction between two objects which are not in contact with each other is known as the _________.

• Normal force

• Gravitational force

• Magnetic force

• Electrical force

Which of the following changes would increase the gravitational force between two objects?

• Increase G

• Increase the mass

• Increase r

• Decrease G

True or False: The gravitational force each tennis ball acts on the other is the same.

• True

• False

As the distance between 2 objects increases, what happens to gravitational force?

• increases
• decreases
• stays the same
• i don't know