A 40-kg door with a height of 2.0 m and a width of 0.80 m is hinged at the end of the door along its vertical height. What is the kinetic energy of the door if it swings at 6.3 rad/s about a vertical axis that passes through the hinge of the door?

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Rotational Equilibrium And Rotational Dynamics

In physics, the state of balance between the forces and the dynamics of motion is called the equilibrium state. The balance between various forces acting on a system in a rotational motion is called rotational equilibrium or rotational dynamics. 

Equilibrium of Forces

The tension created on one body during push or pull is known as force.