Physics Coefficients of Friction

 What is the unit called that measures force?

• weight
• meter
• Newton
• kilogram

Tags

NGSS.HS-PS2-1

What does friction release?

• light
• sound
• heat
• gravity

Tags

NGSS.MS-PS3-5

The force that acts in the opposite direction of motion when two surfaces come in contact. 

• Force
• Friction
• Static
• Kinetic 

What direction does friction act relative to motion?

• in the same direction
• in the opposite direction 
• need more information
• depends on the force

 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

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

A box takes 40 N to start moving when the coefficient of static friction is .54. What is the weight of the box? 

• 81 N
• 18 N
• 98 N
• 74 N

Tags

NGSS.HS-PS2-1

What are the units on the coefficient of friction?

• none
• Newtons
• meters
• kilograms

What are the units on the force due to friction?

• none
• Newtons
• meters
• kilograms

Tags

NGSS.HS-PS2-1

What is the formula for the coefficient of friction?

• F friction / F normal
• F normal / F friction
• F weight / F friction
• F = ma