📚 Fri Apr 09 Forces, Friction and Weight Quiz(A)

What is the unit called that measures mass?

• weight

• meter

• Newton

• kilogram

What does friction produce?

• light
• sound
• heat
• gravity

Tags

NGSS.MS-PS3-3

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

How can friction be reduced?

• reduce the force acting between the 2 surfaces
• reduce the roughness of the 2 surfaces coming in contact
• use wax, grease or oil
• all of the above are ways of reducing friction

Wheels on a skateboard most likely experiences-

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

Sally experiences-

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

How does friction affect speed?

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

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

The amount of friction depends on the weight of the objects pressing together.

• True
• False