Question

Define the following : 

1. Rigid body 

2. point of action of force 

3. line of action of force 

4. principle of transmissibility of force.

Answer 1

(i) Rigid Body : “A body which does not get deformed under the action of a force or a number of forces is called rigid body, 

(ii) Point Of Action Of Force : “The point on the rigid body where a force acts is called the point of action of force.” 

(iii) Line Of Action Of Force : “An imaginary line passing through the point of action of force and drawn in the same direction in which the force acts is called line of action of force. LM is the line of action of force. 

(iv) Principle Of Transmissibility Of Force : “It states that the point of action of force can be transmitted anywhere along the line of action of the force without causing any material difference in the movement of the body.”