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Q.

A jet of water having area of cross  section 10cm2 strikes a wall normally with velocity 2m/s . If the wall is moving away from the jet with a velocity 1m/s  , find the force exerted by jet on the wall in N. Assume water splashes parallel to wall after striking.

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Detailed Solution

F=ρQv=ρ(Av)v=ρAv2=1000×10×10−4×(2−1)2=1N

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