Friction

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

• similar
• opposite
• parallel
• west

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

• True
• False

How can friction be reduced?

• reduce the force acting between the 2 surfaces
• reduce the roughness of the 2 surfaces coming in contact
• use wax, grease or oil
• all of the above are ways of reducing friction

Tags

NGSS.MS-PS2-2

Rougher surfaces have ...

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

How does friction affect speed?

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

Tags

NGSS.MS-PS2-2

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

• True
• False

Tags

NGSS.4-PS3-1

When most objects with smooth surfaces rub, there is less friction.

• True
• False

Force the opposes motion between 2 surfaces

• force
• Newton
• friction
• net force

Smooth surfaces such as ice, usually produce less friction.

• true

• false

People use rough or sticky things to decrease friction.

• true

• false