Friction Quiz Super Duper

How does friction affect speed?

• more friction decreases speed

• more friction increases speed

• less friction decreases speed

The rougher the surface, the faster an object will travel over the surface.

• True
• False

Rougher surfaces have ...

• greater friction
• less friction
• the same level of friction

A child rides her bike down a steep hillside. What is the best explanation of how she is able to slow down the speed of the bike?

• The brakes of the bike create a magnetic field to slow down the bike.

• The rubber of the tires against the pavement reduces the force of friction.

• The brakes rub against the tires to increase friction to slow down the bike.

Friction is a force that acts in a direction ___________ of movement.

• similar

• opposite

• parallel

In the figure a boy is shown pushing the box from right to left. The force of friction will act on the box

• from right to left (←)

• from left to right (→)

• vertically downwards (↓)

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Which of the following help to increase friction:

• oiling of machine parts

• streamlining the ships

• spikes in shoes

Which of these is opposed by kinetic friction?

• a guy leaning against a building

• a standing house of cards

• a box sliding on the floor

The amount of friction depends on the weight of the objects pressing together.

• True
• False

Friction is a __________

• force that requires contact (touch)

• Non-contact force (No touch)

• Magnetic force