The examples of contact forces are ....

The examples of non-contact forces are ....

A force which is produced when two surfaces rub against each other is called a … force.

A … force is applied when we use the muscles in our body, like those in our arms or legs.

A force of attraction between the Earth and an object is called a …. force.

A magnetic force is caused by the pushing and pulling actions of ….

Materials which can be attracted by a magnet are called … materials.

Materials which cannot be attracted by a magnet are called … materials.

Every magnet has two poles. They are … Pole and … Pole.

The attractive or repulsive force between two charged objects is called a/an … force.

Terra’s mother asked Terra to help move some items from the hall closet to the garage. One item she wanted to move was a large box of old school books. Terra tried to lift the box, but could not pick it up.

What force prevented Terra from lifting the box?

Look at the illustration of a block on a table-top. The magnified view illustrates a force that exists between the two objects.

Which type of force is demonstrated in the magnified view above?

Magnets can be useful tools. Look closely at the picture. It shows a magnet and various metal objects.

What will happen as the magnet moves closer to the metal objects?

You are pushing a wheelbarrow.

What happens to the wheelbarrow's motion if more mass is added and you push with the same force?

Which activities require a muscular force? (Click all correct answers.)

What type of forces are required in the activity?

If your mass is 50 kg on the Earth. What is your mass on Mars?

If your weight is 500N on the Earth. What is your weight on Mars?