A store's sign has a mass of 20 kg and is 3.0 m long. It is uniform, so its center of gravity is at the center of the sign. It is supported by a bolt attached to the wall at one end and by a wire at the other end, as shown in the figure. What is the tension in the wire? 3.0 m Hint: A static equilibrium problem. Set the net force in both directions and the net torque equal to zero. It will be convenient to take the bolt as the rotation axis. O 120 N O 180 N O 300 N O 230 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.