Friction Review

Friction is an example of _____________

• contact force

• non contact force

• both of these

• none of these

The direction of force of friction is always _____ to the direction of motion

• same

• opposite

• unchanged

• none of these

Without friction, an object in motion would never stop.

• true

• false

The rouugher the surface, the faster an object will travel over the surface

• true

• false

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

• the marble's speed would decrease

• the marble would remain at a constant speed

• the marble's speed would increase

• the marble would stop immediately

Tags

NGSS.MS-PS2-2

Rough surfaces have _________

• greater friction

• less friction

• the same level of friction

When we rub our hands together _________.

• frictional force works between them

• energy is released

• our hands become warm

• all off the above

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

 What is the unit called that measures force?

• weight
• meter
• Newton
• kilogram

Tags

NGSS.MS-PS2-1

 What is the force of friction between a block of ice that weighs 950 N and the ground if μ = .12? 

• 65 N
• 226 N
• 175 N
• 114 N

Tags

NGSS.HS-PS2-1

What is the coefficient of static friction if it takes 44 N of force to move a box that weighs 86 N? 

• 0.78
• 0.51
• 0.78 N
• 0.58 N

Tags

NGSS.HS-PS2-1