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Q.

A boat of mass 40 kg is at rest. A dog of mass 4 kg moves in the boat with a velocity of 10 m/s(w.r.t ground). The velocity of boat is nearly _____m/s

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answer is 1.

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Detailed Solution

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Initial momentum=final momentum; 

M1V1=m2v2

40×V1=4×10
V =1 m/ s

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