Circular Motion Test

Check off all the ways you can accelerate

• Speed Up

• Slow Down

• Stand Still

• Change direction

You swing a bucket of water attached to a string in a circle above your head. What keeps the water in the bucket?

• Friction
• Centripetal Force
• Gravity
• Inertia

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

• outwards
• towards the center
• tangent
• faster

Which bucket has more inertia?

• The bucket on the left because it has less mass

• The bucket on the right because it has more mass

• They have the same inertia

• The bucket on the right because it has less mass

In uniform circular motion, the magnitude of the _______________________of an object is constant but the __________ is continually changing.

• speed, acceleration

• speed, direction

• acceleration, speed

• acceleration, velocity

Any push or pull on an object.

• force
• velocity 
• inertia
• momentum

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 has a mass of 0.12 kg and her arm is 0.65 meters long.

• 0.38 N

• 1.23 N

• 0.55 N

• 1.66 N

Which statement is true about an object that is traveling in uniform circular motion?

• The speed of the object varies.
• The net force on the object is directed toward the center of the circular path.
• The direction of the object's velocity is constant.
• The net force on the object is directed away from the center of the circular path.

the process or act of turning or circling around something

• Curvature

• Rotation

• Radius

• Orbit

You are moving a ball in a circle using 72 N of centripetal force. What would the force be if you doubled the radius of the circle.

• 18 N

• 36 N

• 72 N

• 144 N