Circular Motion Quiz

• m/s

• rad/s

• m

• s

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DOK Level 1: Recall

Natalie and Jordan are at an amusement park, riding on a giant spinning wheel. If the radius of the wheel is doubled while keeping the speed constant, what happens to the centripetal force required to keep them moving in a circle?

• It doubles

• It remains the same

• It halves

• It quadruples

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DOK Level 2: Skill/Concept

Sydney is spinning a 2 kg frisbee at a constant speed of 3 m/s in a circle with a radius of 0.5 meters. Can you calculate the centripetal force needed to keep the frisbee moving in its path?

• 36 N

• 18 N

• 12 N

• 6 N

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DOK Level 2: Skill/Concept

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DOK Level 2: Skill/Concept

Granger is spinning a frisbee on a string in a circle and suddenly decides to spin it at half the speed. What happens to the frisbee's tangential speed if the length of the string (radius) stays the same?

• It is halved

• It remains the same

• It doubles

• It quadruples

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DOK Level 2: Skill/Concept

Jackson and Diana are at an amusement park, riding on a merry-go-round. Jackson wonders what would happen if the mass of the merry-go-round suddenly doubled while moving at the same speed.

• The force doubles

• The force remains the same

• The force quadruples

• The force halves

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DOK Level 2: Skill/Concept

Match the following

• angular displacement

• angular velocity

• angular acceleration

Layla is driving a car around a curve as shown in the diagram. Which arrow correctly shows the direction of the centripetal acceleration that keeps Layla on track?

• A

• B

• C

• D

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NGSS.MS-PS2-2

You're in a physics class with Peyton and Trey. Peyton explains that (a)   changes an object’s rotational speed, while Trey points out that (b)   changes an object’s direction of motion.

• Angular Acceleration

• Centripetal Acceleration

Answer explanation

Angular acceleration and centripetal acceleration are independent. Angular acceleration changes an object’s rotational speed, while centripetal acceleration changes an object’s direction of motion.

Dylan is observing a toy car whirling uniformly on a circular track. Which statement is true about the car's motion?

• The speed of the car changes as it moves.

• The net force on the car is pulling it toward the center of the track.

• The direction of the car's velocity remains the same throughout.

• The net force on the car pushes it away from the center of the track.