a block of matal weighing 2 kg is resting on a frictionless plane .if it is struck by a jet releasing water at the rate of 1 kg/s and at a speed of 5 m/s find the initial acceleration of the block

Ans -2.5 m/s^2

give a detail answer

since force exerted= change in momentum of water i.e

F=dP/dt

P=MV

here velocity is constant hence force exerted by water=V*dM/dt

dM/dt=1kg/sec

v=5m/sec

hence F=5N

so acceleration=F/M=5/2=2.5m/s2