Friction!

The cars are resting on the truck without moving. What type of friction explains that?

• static friction

• rolling friction

• sliding friction

• fluid friction

Which type of friction will she experience as she gets her feet on the ground?

How can a sailboat increase its fluid friction?

• Make the sail bigger

• Make the sail smaller

• There is no fluid friction

Two boxes need to be moved. Box A is 10kg and Box B is 3kg. Which box will require more force to move?

• Box A

• Box B

• They are equal

Friction is one of many forces. Which type of force is it?

• Contact force

• Non-contact force

Select all the examples of sliding friction

• washing your hands

• sitting in a chair

• skiing down a mountain

• swimming in the pool

• writing in a notebook

The man pushes the box up the ramp. If his friend sits on top of the box, what will happen?

• The friction on the box would be reduced

• The friction on the box would increase

• The friction will disappear

Name the fluid that helps the surfer control her board in the wave.

• Water

• Air

• Sand

Objects that are at rest and not moving have ______ friction. You can overcome the friction by pushing hard enough.

If there was no friction on Earth, you would...

• slide until you hit another object

• be able to climb better

• run faster

• never move