Question

What do you understand by rotational Dynamics?

Answer 1

Having established rotational kinematics, it seems logical to extend our study of rotational motion to dynamics. Just as we began our study of Newtonian dynamics by defining a force, we start our study of rotational dynamics by defining our analogue to a force, the torque. From here, we will derive a general expression for the angular acceleration produced by a torque, which is quite similar to Newton's Second Law. We will also define a new concept, the moment of inertia of a rigid body.

Answer 2

Rotational dynamics
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An obj at rest tends to remain at rest and an obj in rotation tends to continue rotating with constant angular velocity unless compelled by a net external torque to act other

Angular acceleration is directly proportional to net torque and it is inversely proportional to the moment of inertia

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