[填空题]
A person of mass 75 kg stands jbm7e9yu s awebwe 5woq t.:4m/(v8 e6at the center d5sqk 4 lb3v: be) ,dp:qao.5ma 8sw,hvx q)xlof a rotating merry-go-round platform of radius 3.0 m aslb qd aavq,pl4ob: w8)s 35)x5q.: vmxdhe ,knd 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
