Three forces act on a square plate that can rotate in the horizontal plane about a pivot at the lower left corner of the plate, as shown in the figure below. The plate has a mass of M = 15.0 kg and a length of l = 0.500 m on each side. Forces F1 and F2 have the same magnitude of 100 N. What is the magnitude of force F3 if the net torque on the plate has a magnitude of 20.0 N*m and points into the page?

Q: 90° 125 N 90 90.0 N

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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.