Question

A horizontal water jet strikes a stationary vertical plate at a rate of 5 kg/s with a velocity of 35 km/hr. Assume that the water stream moves in the vertical direction after the strike. The force, in N, needed to prevent the plate from moving horizontally is _____ .

Answer 1

48.6 N

Step-by-step explanation:

rate of mass per second, dm/dt = 5 kg/s

Velocity, v = 35 km/hr = 9.72 m/s

Force acting on the plate

F = v x dm/dt

F = 9.72 x 5 = 48.6 N

Thus, the force acting on the plate is 48.6 N.