gc textbook chapter 8 Rotational Motion (id: 7a2f77d66)

[填空题]
A person of mass 75 kg stands at thid5:s1j -kxqc h.lyg4e center of /mpk+,q u(fivqly)2+hwq ge 5a rotating merry-go-round platform of radi 5pq )ui2m(egq+/ qyhkf+ ,wvlus 3.0 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.$K{E}_i$ =    J $K{E}_f$ =    J

参考答案:
空格1: 1.154±2%  空格2: 1800±2%  空格3: 1062±2% 


本题详细解析: