[填空题]
A person of mass 75 kg stands at8a pv4.8jvmkrii;n lq2 g n+9vvcyop(p8 u (v4 the ce0u8 0e5+e8 dqur,xpc 54n,nixvgzbkz3c vnm 8nter of a rotating merry-go-round platform of radius x3mzuee ux ,5kd5 nz c+4ngv8rc8b ni08qpv,03.0 m and moment 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
