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Q.

A juggler throws continuously balls at the rate of three in each second each with a velocity of 10 m s–1. If the mass of each ball is 0.05 kg his power is

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a

2 w

b

50 w

c

0.5 w

d

7.5w

answer is D.

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Detailed Solution

p = wt=3mv22 t    = 3 x ½ x 0.05 x 10 x10   = 7.5 w
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