A merry-go-round rotates at the rate of 0.20 rev/s with an 80-kg man standing at a point 2.0 m from the axis of rotation. (a) What is the new angular speed when the man walks to a point 0.6 m from the center? Assume that the merry-go-round is a solid 25-kg cylind rad/sec (b) Calculate the change in kinetic energy due to this movement. How do you account for this change in kinetic energy? O The moment arm of the man about the axis of rotation decreases. Work is done by the merry-go-round on the man as he moves towards the center. O Work is done by the man on the system as he moves towards the center. O wind resistance varies as the square of the speed.

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A merry-go-round rotates at the rate of 0.20 rev/s with an 80-kg man standing at a point 2.0 m from the axis of rotation.
(a) What is the new angular speed when the man walks to a point 0.6 m from the center? Assume that the merry-go-round is a solid 25-kg cylinder of radius 2.0 m.
rad/sec
(b) Calculate the change in kinetic energy due to this movement.
How do you account for this change in kinetic energy?
O The moment arm of the man about the axis of rotation decreases.
O Work is done by the merry-go-round on the man as he moves towards the center.
O Work is done by the man on the system as he moves towards the center.
O wind resistance varies as the square of the speed.
Transcribed Image Text:A merry-go-round rotates at the rate of 0.20 rev/s with an 80-kg man standing at a point 2.0 m from the axis of rotation. (a) What is the new angular speed when the man walks to a point 0.6 m from the center? Assume that the merry-go-round is a solid 25-kg cylinder of radius 2.0 m. rad/sec (b) Calculate the change in kinetic energy due to this movement. How do you account for this change in kinetic energy? O The moment arm of the man about the axis of rotation decreases. O Work is done by the merry-go-round on the man as he moves towards the center. O Work is done by the man on the system as he moves towards the center. O wind resistance varies as the square of the speed.
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