[填空题]
A person of mass 75 kg stands at the center of a rotating merry-gtw)r** viqst6a1xy 7jfl6 f s4o-round platfor7* xj 6sr)4a*fq1iyw lvt6 tsfdnm+,oxx h. m;sgrz - h.-)onwm of radius 3.0 m and moment of inertiag.nszow. mh;r )mo-hx dn-x ,+ 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
