A person of mass 80 kg stands at the center of a rotating merry-go-round platform of radius 3.5 m and moment of inertia 950 kg*m^2 . The platform rotates without friction with angular velocity 0.85 rad/s . The person walks radially to the edge of the platform.
1. Calculate the angular velocity when the person reaches the edge.
w= rad/s
2. Calculate the rotational kinetic energy of the system of platform plus person before the person's walk.
Ki= J
3. Calculate the rotational kinetic energy of the system of platform plus person after the person's walk.
Kf= J