Friction

Friction is the ____________ that one surface exerts on another surface.

• gravity

• motion

• force

What does friction do to the motion of an object?

• Friction slows down or stops an object.

• Friction keeps an object from moving.

• Both of the above

What does the strength of the force depend on? Check the answers that apply.

• The types of surfaces

• The weather

• The color of the object

• motion

A hard wood floor has more friction than a carpet.

• true

• false

Rolling friction is when an object ___________ over a surface.

• bounces

• rolls

• slides

The more friction that there is, the slower an object will move.

• true

• false

Friction is a

• non - contact force

• contact force

• electrostatic force

• magnetic force

It is difficult to walk on an oily floor because

• Floor gets spoiled

• There is more resistance

• Force of friction is high

• Force of friction is very less

Friction can be increased by making the surface

• rough

• smooth

• does not depend on the nature of surface

• none of these

In the figure a boy is seen pushing a box from right to left. The force of friction will act on the box

• from right to left

• from left to right

• vertically downwards

• vertically upwards