Circular Motion Practice

If the bowling ball in the picture is going around counter-clockwise, which arrow shows the right direction for the velocity of the ball when it is at the location shown?

• A

• B

• C

• D

What relationship exists between the radius of a circle and the centripetal acceleration?

• direct
• inverse
• exponential
• inverse squared

Which of the following is the unit for centripetal force?

• J
• m/s²
• kg⋅m/s
• N

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

Where is the net force when the rollercoaster is at the top of the loop?

• Towards the sky
• Towards the Right
• Towards the left
• Towards the ground

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

As this ride starts to spin in a circular motion the swings move outward. What causes the swings to be pulled outward from the center?

• Gravity

• Centripetal Force

• Speed

• Inertia

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.

• 2.4 m/s
• 3.6 m/s
• 3.9 m/s
• 4.2 m/s

Bruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration?

• 0.25 ms^-2
• 0.5 ms^-2
• 1 ms^-2
• 2 ms^-2

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

Which quantity is measured in newtons?

• density
• energy
• pressure
• weight