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# FORCES

In the school and at home, we see many moving things. We move about on our legs, vehicles move on roads, trains on the rails, aeroplanes fly in the sky and ships sail on the seas. Movement occurs when a force is applied on a thing or object. That is, force causes things to move. It can also prevent things from moving.

## MEANING OF FORCE

A force is a pull or push on a object. That’s, force opposed movement or causes objects to movement. For example, car’s accelerator and break or to change direction (steering).

## TYPES/EXAMPLES/ EVIDENCE OF FORCE

There are many types of forces, but only five are discussed below:

1. Muscular Force
2. Gravitational Force
3. Magnetic Force
4. Electrical Force
5. Frictional Force

INCLINED PLANE

PULLEYS

LEVERS

## DEMONSTRATING DIFFERENT TYPES OF FORCE

### EFFECTS OF FORCE

A force acting on an object may cause the object:

1. To change shape and size.
2. To start moving.
3. To stop moving.
4. To accelerate or decelerate.

## Strategies & Activities

Step: Teacher revises the previous topic

Step 2: Teacher introduces the new topic.

Step3: Teacher endeavors to explain all the points to the pupils thoroughly.

Step 4: Teacher welcomes pupils’ questions.

Step 5: Teacher evaluates the pupils.

## Assessment & Evaluation

1. Define force.
2. Give three examples of Force.
3. Describe the effect of force on materials.