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Q.

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 3m/s. With what velocity does the boat begin to move backwards

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a

0.6 ms-1

b

0.5 ms-1

c

0.7 ms-1

d

0.55 ms-1

answer is B.

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Detailed Solution

Mass of the girl = 50kg

Mass of the boat =300kg

Velocity of the girl =3 m/s

MV=mv V=mvM =50×3300=0.5 ms-1

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