Question

State four effects which a force can bring about. Give two examples in each case.

Answer 1

Effects of force: A force can bring about the following effects.

1. Force can set a stationary body into motion.
For example:

1. A player can set a ball (at rest) in motion by hitting it with suitable material like hockey.
2. A magnet can move an iron nail.

2. Force can stop the moving bodies.
For example:

1. A speeding car is stopped by the force of friction of brakes.
2. A rolling football stops because of the force of friction from the ground.

3. Force can change the speed or direction of a moving body.
For example:

1. A stone projected vertically upwards changes its speed and direction of motion because of the force of gravity.
2. A moving bicycle starts running faster when more force is applied to its peddles.

4. Force can change the dimensions of a body.
For example:

1. Lenght of a rubber band increases, when stretching force is applied to it.
2. We clay can be moulded in any shape by applying a force with hands.