Question

answer all the questions

1. laws of rotational motion.

2 conditions of a body to be in equilibrium
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Answer 1

Answer

Laws of Rotational motion:

• a body continues to be in state of rest or state of uniform rotational motion about a given axis,unless an external torque is applied on it.

• the rate of change of angular momentum of a body about a given axis of rotation is directly proportional to the external torque applied on it.

• for every torque there is an equal and opposite torque.

Equilibrium of a rigid body:

A body under the action of several forces said to be in equilibrium

of provided that satisfy the following two conditions :

• body is in translational equilibrium

• body is in rotational equilibrium