Physics of Circular Motion

What does Newton's second law say about objects in circular motion?

• They move at a constant velocity.

• They do not experience any force.

• They experience a net force because they are accelerating.

• They only experience gravitational force.

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How does the velocity of an object in circular motion change?

• It remains constant.

• It decreases over time.

• It increases in speed.

• Its direction changes.

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What term is used to describe the net force on an object moving in a circle?

• Tangential force

• Centripetal force

• Gravitational force

• Frictional force

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What does the Latin origin of 'centripetal' suggest about its force?

• It seeks the center.

• It repels motion.

• It seeks the edge.

• It enhances speed.

What happens to the tennis ball's direction of motion if the string is cut?

• It stops moving.

• It moves in the tangential direction at the moment of the cut.

• It continues moving in a circle.

• It moves towards the center.

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What would happen to the tennis ball if the centripetal force ceased?

• It would move towards the center.

• It would stop immediately.

• It would fall to the ground.

• It would move in a straight line in the tangential direction.

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What is the direction of the centripetal force acting on an object in circular motion?

• Towards the center of the circle.

• In the direction of the object's velocity.

• Opposite to the gravitational force.

• Towards the outside of the circle.

Why does the tennis ball accelerate while moving in a circle?

• Due to air resistance.

• Because of gravity.

• Due to the centripetal force.

• Because of the tangential velocity.

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Why is the centripetal force essential for objects in circular motion?

• It keeps the object moving in a circle by directing it towards the center.

• It prevents the object from falling.

• It increases the object's speed.

• It balances the gravitational force.

What real-life example is given to illustrate the application of centripetal force?

• Swinging a tennis ball

• Driving a car in a straight line

• A roller coaster going through a loop

• The orbit of planets

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NGSS.HS-ESS1-4