PMA1- Contact and Non-Contact Forces

Front

What is a contact force?

Back

A contact force is a force that occurs when two objects are physically touching each other.

Front

What is a non-contact force?

Back

A non-contact force is a force that acts on an object without physical contact, such as gravitational force or magnetic force.

Front

What happens when the North Pole of a magnet is near a compass needle that is also a North Pole?

Back

The compass needle will move clockwise (to the right) due to the repelling force between the two North Poles.

Front

What is friction?

Back

Friction is a contact force that opposes the motion of an object when it is in contact with another surface.

Front

What is static electricity?

Back

Static electricity is the buildup of electric charge on the surface of objects, which can result in a sudden discharge of electricity.

Front

What is current electricity?

Back

Current electricity is the flow of electric charge (electrons) through a conductor, such as a wire.

Front

What is the difference between static electricity and current electricity?

Back

Static electricity involves a single transfer of electrons, while current electricity involves a continuous flow of electrons.

Front

What type of force is the pull between two people through a rope?

Back

The pull between two people through a rope is a contact pull.

Front

What is an example of a non-contact force?

Back

An example of a non-contact force is the gravitational force that pulls objects towards the Earth.

Front

What is an example of a contact force?

Back

An example of a contact force is friction, which occurs when two surfaces rub against each other.