A juggler throws six balls vertically up at interval of $1$ second. His maximum speed of throw so that six balls in air is :
$(g = 10 m / s^{2})$

40 m / s

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30 m / s

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20 m / s

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50 m / s

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Solution

The correct option is C $30 m / s$
A juggler throws six balls, the first ball is about to reach his hand, then the time of journey of each ball is $6 s e c$ . The ball reach at highest point in 3 sec.

$v = 0 m / s$ Final velocity

$u = ?$ initial velocity

$g = - 10 m / s^{2}$

1st equation of motion,

$v = u + g t$

$u = 10 \times 3$

$u = 30 m / s$

The correct option is B.

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A juggler throws six balls vertically up at interval of 1 second. His maximum speed of throw so that six balls in air is : (g=10 m/s2)

A juggler throws six balls vertically up at interval of $1$ second. His maximum speed of throw so that six balls in air is :
$(g = 10 m / s^{2})$