Quiz: Friction - Why Hockey Rinks Are Not Carpeted

What is the primary reason a hockey puck travels farther on ice than on carpet?

• • Ice is smoother and has less friction than carpet.

• • Ice is colder than carpet.

• • Hockey sticks work better on ice.

• • Pucks are heavier on carpet.

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What happens to a hockey puck when it is pushed across a carpet?

• • It speeds up.

• • It keeps moving indefinitely.

• • It slows down and stops quickly due to friction.

• • It moves faster as the carpet pushes it forward.

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What is friction?

• • A force that speeds up moving objects.

• • A force that slows down objects as they move across surfaces.

• • A type of motion that occurs on smooth surfaces.

• • A material that makes surfaces rough.

Which surface would likely create the least friction for a moving object?

• • Gravel

• • Sandpaper

• • Ice

• • Carpet

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Why is space considered a place with no friction?

• • There is no air to create air resistance.

• • There are many objects in space that slow things down.

• • Space is colder than Earth’s atmosphere.

• • Gravity does not exist in space.

What is air resistance?

• • A type of gravity that only acts on the ground.

• • A force that speeds up objects as they move through air.

• • A type of friction caused by air molecules that slows down objects.

• • A force that acts only on objects moving upward.

When does a moving object in space stop?

• • When it runs out of energy.

• • When it reaches the edge of space.

• • When a force is exerted on it, like a collision.

• • When it moves fast enough to lose momentum.

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Why doesn’t a hockey puck keep moving forever on Earth?

• • Gravity pulls it down.

• • Friction from the ice or carpet slows it down.

• • It loses energy quickly.

• • The puck is too heavy to keep moving.

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What would happen to a hockey puck in space if it was pushed?

• • It would keep moving until it hit something.

• • It would immediately stop.

• • It would float in place.

• • It would move in circles.

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Which of the following statements about friction is true?

• • Friction only occurs on rough surfaces.

• • Friction speeds up objects.

• • Friction opposes the motion of moving objects.

• • Friction does not exist on Earth.