What is Force ? Full detail from Class 6 to 8.

 FORCE

What you learn?

• What is Force?
• Force applied by interaction.
• Resultant Force.
• Effect of Force?
• Types of Force.

                               What is Force?

• Force is a physical cause that can change the position or dimension of any object or trying to change.
• You will notice that each of these actions is either push or pull.
• Pushes and Pulls are Forces. The direction in which an object is pushed or pulled is called the direction of a force.

• We apply force to perform various activities--To lift a glass of water,To ride a bicycle, To push the switch a TV Set to put it on, or to open the car door to get in.

Activity 1( Critical Thinking)

To identify any action as a push or pull. Look at the pictures in fig-1.1. Identify the action in each picture as pushing, pulling, lifting, kicking, stopping, throwing, etc. Then try to see if the action can be grouped as a push or pull.

Activity 2 (Resultant Force)

• The net affect of two forces acting on a body.

Push a heavy object to move it. You might be able to move it with some difficulty. Now ask one of your friends to help by pushing with you in the same direction.

Can you together push it more easily? Why?

Now push the object again, but ask your friend to push it from the opposite direction.

Does the object move now? Why?

Effects of Force

What can a Force do?

1. Force can make a stationary object move or can change its position of rest.
2. Force can change the speed of a moving object.
3. Force can change the direction of motion of a moving object. 
4. Force can change the shape or size of an object.

Types Of Force

• Contact Force
• Non-Contact Force

Contact Force

Contact Force are forces that act between two objects when they are in physically contact with each other.

Eg:- Muscular Forces, Frictional Forces.

Non-Contact Force

Non-contact Force are forces that act between two objects that are not physically touching each other.

Eg:-Gravitational Forces, Magnetic Forces.