Question

A person of mass 72 kg stands at the center of a rotating merry-go-round platform of radius 3.3 m and moment of inertia 870 kg⋅m2 . The platform rotates without friction with angular velocity 0.90 rad/s . The person walks radially to the edge of the platform. part a: Calculate the angular velocity when the person reaches the edge. Express your answer using three significant figures and include the appropriate units. part b: Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk. Express your answers using two significant figures. Enter your answers numerically separated by a comma.

Answer #1

A person of mass 72 kg stands at the center of a rotating
merry-go-round platform of radius 2.7 m and moment of inertia 860
kg?m2 . The platform rotates without friction with angular velocity
0.95 rad/s . The person walks radially to the edge of the
platform.
Calculate the angular velocity when the person reaches the
edge.
Calculate the rotational kinetic energy of the system of
platform plus person before and after the person's walk

A person of mass 70 kg stands at the center of a rotating
merry-go-round platform of radius 3.2 m and moment of inertia 860
kg⋅m2 . The platform rotates without friction with angular velocity
0.95 rad/s . The person walks radially to the edge of the platform.
A. Calculate the angular velocity when the person reaches the edge.
B. Calculate the rotational kinetic energy of the system of
platform plus person before and after the person's walk.

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platform. You may ignore the size of the person.
(a) Calculate the angular velocity when the person reaches the
edge of the merry-go-round.
(b) Calculate the rotational kinetic energy of the system of
platform...

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Answer to 3 significant figures.

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