Question

B. Short/Long Answer Questions : 1. Define force. State its S.I. unit. 2. State two effects of a force when applied on a body. 3. How does the effect of a force differ when it is applied on (a) a rigid body, (b) a non-rigid body? 4. State the effect of force F in each of the following diagrams (a) and (b). Ball Wheel F Pivot F (a) (b)​

Answer 1

1 Force is a quantity that is measured using the standard metric unit known as the Newton.

2 Two effects of a force applied on a body are: (i) It can change the state of movement of the body on which force is applied

3 (a) When a force is applied on a rigid body, it does not change the interspacing of constituent molecules and the dimension, which can cause motion in it. (b) When a force is applied on a non-rigid body, it changes the interspacing between its constituent molecules and dimension,