Force and type of forces

What is a Force?

Some forces can act over a distance, and others can only act by contact. Which type of force can act only when two objects touch each other?

The illustration below shows what happened when a balloon touched a girl’s hair.

Which type of force caused the girl’s hair to cling to the balloon?

Magnets can be a useful tool. Look closely at the picture below which shows a magnet and various metal objects.

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

_________ opposes motion.

An object drops due to the force of _____________.

What force holds the planets in motion around the sun?