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

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本题目来源于试卷: gc textbook chapter 8 Rotational Motion，类别为 unclassified

[填空题]
A person of mass 75 kg stands atp rc)773gw,vafpr3c mo:p4 ct the center of a rotatidxbqnx (k1nu9 )b( o1ang merry-go-round platform of radius 3.0 m and moment of inerdx9on)( baq1 b knu1(xtia 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

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


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