Sec 2NT Ch 12.1: What Is A Force?

A force is a __________.

Which of the following actions does not involve pushing?

• closing the drawer

• pressing a doorbell

• squeezing a wet sponge

• stretching a rubber band

Which of the following actions does not involve pulling?

• closing the classroom door

• lifting books

• opening the refrigerator door

• tugging a kite string

What does friction do?

• It makes an object move faster.

• It moves the object in a straight line.

• It moves a stationary object.

• It opposes motion.

Which of the following objects does not have elastic forces?

• bow and arrow

• magnet

• rubber band

• spring

Which of the following cannot be be attracted to a magnet?

• copper

• iron

• nickel

• steel

Magnets exert magnetic forces on each other.

What happens when like poles are brought together?

• They attract.

• They repel.

Magnets exert magnetic forces on each other.

What happens when unlike poles are brought together?

• They attract.

• They repel.

Which force is responsible for making a book drop to the ground?

• elastic force

• frictional force

• gravitational force

• magnetic force

What is weight?

• It is the amount of matter in an object.

• It is the gravitational force acting on the object.

• It can be measured using mass balance.

• It can be measured in cm.