Friction

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

Frictional force depends on ____

• surface area in contact

• roughness of surface

• both a and b

• none of the above

What type of friction is not moving?

• static
• sliding
• fluid
• rolling

Which type of friction keeps objects from sliding around all over the place

• Static Friction

• Rolling Friction

• Fluid Friction

• Sliding Friction

 What is the unit called that measures force?

• weight
• meter
• Newton
• kilogram

What does friction produce?

• light
• sound
• heat
• gravity

Tags

NGSS.MS-PS3-5

What direction does friction act relative to motion?

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

Which of the following is an example of friction that is helpful?

• Brakes used on a bike
• Tires from a car on the road
• Tread on the bottom of your shoes
• All are examples that are helpful