Frictional Forces

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

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

• similar
• opposite
• parallel
• west

What does friction produce?

• light
• sound
• heat
• gravity

Which of the following answers is the most scientific answer for the question:

What is friction?

• The random force between two solids, liquids, or gases.

• The contact force between two solids, liquids, or gases that slide past one another.

• The thing that creates static electricity

• A force that is random

When there is friction, the energy of an object's motion is converted into _______ energy

• heat

• kinetic

• stronger

• friction

Tags

NGSS.MS-PS3-5

Which of the following is NOT an example of friction?

• using the brakes on your bike to slow you down

• putting your hand out the window

• a satellite traveling through deep space

• a hockey puck going across an ice rink

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

Tags

NGSS.MS-PS2-2

On which surface will a toy car travel the furthest?

• Carpet
• Polished Wood
• Ice

Rougher surfaces have ...

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