Door A is 2 m high and 1 m wide is made of light fiber with a steel frame. The mass of the fiber is negligible. The uniform steel frame goes around the perimeter of the door (thick black line) and has a total mass of 6 kg. What is the rotational inertia of Door A around its hinge?

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Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.