A 3.7-m-diameter merry-go-round is rotating freely with an angular velocity of 0.90 rad/s . Its total moment of inertia is 1400 kg⋅m2 . Four people standing on the ground, each of mass 64 kg , suddenly step onto the edge of the merry-go-round. a) What is the angular velocity of the merry-go-round now? b) What if the people were on it initially and then jumped off in a radial direction (relative to the merry-go-round)?

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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.