Friction

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

• similar
• opposite
• parallel
• west

A type of friction that occurs when air pushes against a moving object causing it to decelerate.

• surface area
• air resistance
• velocity
• gravity 

How would the absence of friction affect a marble traveling on a long, straight path?

• The marble’s speed would decrease.
• The marble’s speed would increase.
• The marble would stop immediately. 
• The marble would remain at constant speed.

Tags

NGSS.MS-PS2-2

How would the absence of friction affect a marble traveling on a long, straight path?

• The marble’s speed would decrease.
• The marble’s speed would increase.
• The marble would stop immediately. 
• The marble would remain at constant speed.

Tags

NGSS.MS-PS2-2

Swimming fish experience-

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

Tags

NGSS.MS-PS2-2

How does friction affect speed?

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

Tags

NGSS.MS-PS2-2

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

• True
• False

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

• True
• False

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

• True
• False

 What is the unit called that measures force?

• weight
• meter
• Newton
• kilogram

Tags

NGSS.MS-PS2-1