A box with mass 10 kg and a box with mass 15 kg are placed at the left and the right end of a seesaw. The distance from the pivot to each end is 4 m. An additional box with unknown mass is placed 2 m away to the left from the pivot to balance the seesaw as shown in the figure below. In this problem, use g = 10 m/s2.   (a) What is the torque on the seesaw due to the weight force of the box with mass 10 kg? Include + or - sign in your answer to indicate the direction.  (b) What is the torque on the seesaw due to the weight force of the box with mass 15 kg? Include + or - sign in your answer to indicate the direction.  (c) What is the mass of the box placed 2 m away from the pivot?

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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.