What is a force?

A force is

or a pull.

It is an action that can change the shap

e,size

and

motion

of an object.

a push

The following examples show the different effects of forces.

An arrow hits into a target.

(The arrow pushes into the target)

An athlete reaches the finishing line and the finishing line is being stretched.

(The athlete pushes the finishing line and the finishing line is being pulled)

A basketball goes through through the net.

(The basketball pushes through the net)

Is it a push or a pull?Is it a push or a pull?

Action I s it a push or a pull?

Dragging

Poking

Pressing

Squeezing

Stepping

Stretching

Tugging

Wringing

Push

Pull

Push

Push

Push/pull

Push

Pull

Pull

What is this woman doing?

Well done!

She is pulling the handle to lift up the weight.

What will happen when you step on the step-pad ?

Yes. The lid will open.

Are you pushing or pulling the step-pad?

Well done! You are pushing the step-pad.

What is the man trying to do?

Yes. He is trying to drill a hole.

Is the drill bit pushing or pulling itself into the wood?

Well done! The drill bit is pushing itself into the wood.

What happens when a force is applied?

The stationary object moves

What happens when a force is applied?

The speed of the object increases

What happens when a force is applied?

The object changes direction

What happens when a force is applied?

The moving object stops moving.

What happens when a force is applied?

The shape of the object changes.

Effects of forces

1. Force can move a stationary object.2. Force can change the speed of a moving object.

3. Force can stop a moving object.

Effects of forces

4. Force can change direction of a moving object.

4. Force can change the shape of an object.