1.

Water jet coming out of a stationary horizontal tube at speed v strikes horizontally a massive wall moving in opposite with same speed. Water come to rest relative to wall after striking. Treating A as cross-section of jet and density of water as rho. Select the correct alternative(s)

Answer»

force exerted on the WALL is `2rhoAv^(2)`
force exerted on the wall is `4rhoAv^(2)`
rate of CHANGE of kinetic ENERGY of water jet STRIKING the wall is `8 rhoAv^(3)`
rate of change of kinetic energy of water jet striking the wall is zero

Answer :B::D


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