Question

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A girl of mass 50 kg jumps out of a rowing boat of mass 300 kg on to the bank, with a horizontal velocity
of 3 m/s. With what velocity does the boat begin to move backwards ?
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Answer 1

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Answer 2

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★ Question :-

A girl of mass 50 kg jumps out of a rowing boat of mass 300 kg on to the bank, with a horizontal velocity of 3 m/s. With what velocity does the boat begin to move backwards ?

★ To find :-

The velocity Does the boat Begin To move Backwards ?

★ Solution :-

Mass of boat Mb = 300g

Velocity Of boat Vb

Mass of girl , Mg = 50 Kg

Velocity of Girl , Vg = 3 m/s

According To The law of conservation Of momentum :

MbVb = mgvg

30 × Vb = 50 × 3

Vb = 60 × 3 / 300

= 0.5 m/s

So , The boat Begin to move backward With 0.5 m/s

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