Which of these surfaces give greatest friction for a cyclist riding their bike?

• Sand

• Tile

• Snow

Force that opposite with the motion when two surface contact is called _____________.

• pull

• push

• friction

Why is person B having a hard time moving down the hill?

• Person B has more friction than person A.

• Person B has the same friction as person A.

• Person B has less friction has person A.

When we are rubbing the hands, the friction between hands produces _____________.

• light

• fire

• heat

Which arrow shows friction force?

• A

• B

• C

Surface ________________ produce greatest friction force.

• 
• 
• 

There is a friction force between ______________.

• the bicycle's tire and the road

• the ball and the ground

• all answers are correct

Which statement is correct?

• Rough surface gives least friction

• Smooth surface gives greater friction

• Friction pushes against the movement, so it slows down the moving object.

Why can we slip over the wet floor?

• Wet floor make us move slower

• Wet floor prevent us slipping down

• Wet floor gives less friction

We are able to walk because of friction between the ____________ and the ground

• push

• foot

• pull