[填空题]
A person of mass 75 6 r2 s5rpe )g/rkp2x+nsc; qsfkg stands at the center of a rotatiktwb ti.q9e2oott-p) oghx n8bo71 * .ng merry-go-round platform of radius 3.0 m and moment of inertia 98oq pbt hgk b.oott-9xtw e*oni2.)1720 $kg \cdot m^2$ 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
