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A juggler throws ball into air. He throu...

A juggler throws ball into air. He throus one whenever the previus one is at its highest point. How high do the balls rise if he throus (n) balls each second. Acceleration the to gravity=g`.

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The correct Answer is:
C
For speeding down `vec(a).vec(v) lt 0 rArr a_(x)v_(x)+a_(y)v_(y) lt 0`
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