Forces and motion

Forces and motion

How forces act

Multiple Choice

If an apple is detached from the stem, to which direction will it move?

• upwards

• downwards

• it will not move

The apple falls downwards due to gravitational force.

Gravity pulls everything towards the Earth's core.

Pull an elastic band & release it.

To which way does the elastic band move?

It comes to its original position as soon as it's released. It is because the force which was acting on it is no longer there.

If you take a magnet closer to iron pins....

All the pins will move towards the magnet. It is because the pins attract to the magnet due to the magnetic force.

There are many types of forces that act in different ways.

Multiple Choice

Forces can act in ...................... direction(s).

• only one

• all

Weight is also a type of force. It is caused by gravity.

Force Diagrams

We can show the direction of forces and the size of the forces on an object in a drawing . This type of a drawing is called a force diagram.

Each force is shown by an arrow head. When the forces are equal, the length of the arrows are also equal.

Forces always act in pairs. The two forces act in opposite directions.