[填空题]
A person of mass 75 kg stands at the center o8ik6f czw1q4ec-7gl w2 i5od k5fcpp, f a rotating merry-go-round platfor fwfpcwzkok pi-6 d5l25c 4,87ieq1cgpygwi30 ..lrrj+ a8ey zqi1,fm of radius 3.0 m and moqjpgr.w08izf ,y.ayr le+ i31ment of inertia 920 $kg \cdot m^2$ The platform rotates without friction with angular velocity 2 $rad/s$ The person walks radially to the edge of the platform. (a) Calculate the angular velocity when the person reaches the edge. $rad/s$ (b) Calculate the rotational kinetic energy of the system of platform plus person before and after the person’s walk.$KE_i$ = J $KE_f$ = J
Post time 2025-2-18 20:00:22
