Friction

Static Friction is present only when an object is at rest.

• True.

• False.

Static and kinetic friction can be present simultaneously.

• True

• False.

What is a friction force acting upon an object on wheels?

• Static 
• Sliding 
• Rolling 
• Fluid 

What is a friction force  acting on an NON- moving object.

• Static friction 
• Fuild friction 
• Rolling friction 
• Sliding Friction 

Friction always...

• Resists motion

• Is negative

• Goes against the applied force

• Is determined by weight

Kinetic friction is always ... than Static friction

• Greater

• Lesser

• Similar

• unrelated

What does friction produce?

• light
• sound
• heat
• gravity

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

• True
• False

How does friction affect speed?

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

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