but the V2of the ball is 4/3Piab^2.so,V1/V2=2/Pisqrt(3).
It is constant.Where we cut,b is not useful.
but the V2of the ball is 4/3Piab^2.so,V1/V2=2/Pisqrt(3).
It is constant.Where we cut,b is not useful.
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