A boy and girl are rotating on a piece of playground equipment. As they turn at...
A boy and girl are rotating on a piece of playground equipment. As they turn at a constant angular speed another kid jumps on the edge of the platform in a radial direction. what is the effect on the rotating platform?
Homework Answers
when the kid jump of the equipment in radial direction, he/she does not contribute to the angular momentum, in this process the angular momentum is conserved, we have
I0w0 = IW
after the kid jump in, I>I0
W = I0/I *W0 <W0
the angular speed will decrease
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