Friction Quiz

Which of these materials do you predict would have the MOST amount of friction?

• tile

• metal

• denim

• sandpaper

How does friction affect speed?

• more friction decreases speed

• more friction increases speed

• less friction decreases speed

• less friction does not affect speed

What does friction produce?

• light

• heat

• sound

• gravity

Which of these best describes friction?

• gravity

• a rubbing force

• something that is slippery

• movement across a smooth surface

What is the role of friction in stopping a moving object?

• Friction changes the direction of the object

• Friction slows down the object

• Friction speeds up the object

• Friction has no effect on the object

Which surface would likely have the least friction?

• Concrete

• Carpet

• Ice

• Wood

How can friction be reduced in machinery?

• By adding more weight

• By using lubricants

• By increasing surface roughness

• By increasing speed

Friction is good because....

• It allows things to start

• It acts as brakes

• Both of the above

After a sudden, brief push from a hand to get them moving, carts slow down because...

• a) The hand is no longer in contact with the cart.
• b) The force from hand runs out.
• c) Friction is acting in the opposite direction of the motion.
• d) Friction is acting in the same direction of the motion.

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