Friction

There is ______ friction on a smooth surface.

• more

• less

• no

• lots of

Friction is the _____ between two objects.

• force

• object

• sand

• liquid

Friction moves in the ______ direction of the object moving.

• same

• different

• opposite

What will happen to the friction when an item moves on a rough surface?

• Nothing

• It will decrease.

• It will increase.

• It will disappear.

When is having less friction useful?

• walking

• driving

• ice skating

• climbing

How does friction affect speed?

• more friction decreases speed
• more friction increases speed
• less friction decreases speed

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

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

• True
• False

What does friction produce?

• light
• sound
• heat
• gravity

Tags

NGSS.MS-PS3-3

We use oil to _____ the friction between the moving parts inside a car engine.

• wash

• reduce

• increase

What would happen if you polished a wooden floor?

• Friction would be increased and the floor would be slippery.

• Friction would be decreased and the floor would be slippery.

• Friction would remain the same and the floor would no longer be slippery.