Friction Quiz

How does friction affect speed?

• more friction decreases speed
• more friction increases speed
• less friction decreases speed
• less friction doesn't affect speed

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

• True
• False

On which surface will a toy car travel the furthest?

• 
• 
• 
• 

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NGSS.3-PS2-1

NGSS.3-PS2-2

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.

• The speed of the bike creates a decreases in the gravitational pull

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NGSS.MS-PS2-2

Which type of friction occurs when objects are not moving?

• static
• sliding
• fluid
• rolling

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

• similar

• opposite

• parallel

• perpendicular

How can friction be reduced?

• Reduce the force acting between the two surfaces.

• Reduce the roughness of the two surfaces coming in contact.

• Use wax, grease, or oil.

• All of the above are ways of reducing friction.

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

• True
• False

True or False: Friction occurs when microscopic hills and valleys stick together.

• True

• False