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A puck slides along an icy surface. What makes it slow down?
It runs out of push
It rubs against the ice
It runs out of electricity
A boy sits halfway down a grassy slope. What force stops him sliding down?
On which surface will a toy sledge travel the furthest?
On which surface will a toy sledge travel the least distance?
Rougher surfaces have ...
the same level of friction
Which of the following is an example of trying to increase friction?
Squirting oil into door hinges
Spreading grit on icy roads
Waxing the underneath of skis
Which of the following statements is true?
Friction is a force that only occurs between solids
Friction is a force that only occurs on rough surfaces
Friction is a force that only occurs when surfaces touch each other
Which of the following statements is false?
Friction can only slow things down
Friction is never useful
Friction can stop things from moving
Air resistance and water resistance are both types of friction. Is this true or false?
Neither true nor false
If you poured oil onto a wooden surface, the friction would ...
remain the same