A thin empty frame is hung along side A (see figure). Side A is 1.1 m long and side B is 0.9169 m long. Side C is hit by a bullet with a mass of 22.8 g, an initial speed of 182 m/s and a final speed of −106 m/s. Calculate the rotational speed of the frame after the ball has bounced against it if the frame rotates frictionlessly about the z-axis and the line density of the frame is 4,302 kg/m. Assume that the ball bounces straight back after the impact.

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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.