Question

Explain the significance of moment of inertia in rotatory motion

Answer 1

Answer:

As the mass increases, inertia becomes larger. ... In rotational motion, greater the moment of inertia, angular acceleration will require more torque. It is important to understand that the moment of inertia depends on three factors, and they are: Mass of the body.

Explanation:

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Answer 2

Inertia of Motion :-

It is the inability of the body to change by its self its state of motion in straight line.

Example :-

• when moving bus is suddenly stopped the person fall forward this is because when brake is applied lower part of the body comes to the rest but upper part remains in motion due to inertia of motion. Hence, person falls forward.
• when a person jumps out of a moving bus or train he tends to falls forward this is because on jumping , feet of the person comes to rest after touching the ground but upper part remains in motion due to inertia of motion.

Extra:

Inertia :-

It is the internal property of the body which resist it to change its state.

or It is inability of body to change its state of rest or uniform motion.

Example :

Consider two stationary bodies one heavier than other. if we apply some force on these bodies it has been found that it is difficult to move heavier body than lighter body therefore we can say heavier body has more inertia than lighter body.