Problem 3 A child with a mass of 30kg decides to jump onto the edge of a merry-go-round (carousel) that was initially rotating with angular velocity 0.80 rad/s. The merry-go-round has a mass of 500 kg and radius of 3.5 m and can be modelled as a uniform disk. (I = (1/2)MR2) (A) Assume there is no net external torque. The child stands on the ground, faces the center of the merry-go-round, and jumps straight forward onto the edge. What will the angular velocity of the merry-go-round be after the child jumps onto the edge? (B) Now, let’s say the merry-go-round is rusty and, with the child still on the edge, it slows down to rest in 1 minute. What is the net torque?

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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.