Therefore, the water jet applies a force of 1767 N on the plate in the direction of motion, and an equal and opposite force
must be applied on the plate if its velocity is to remain constant.
Discussion Note that we used the relative velocity in the determination of the mass flow rate of water in the momentum
analysis since water will enter the control volume at this rate. (In the limiting case of the plate and the water jet moving at
the same velocity, the mass flow rate of water relative to the plate will be zero since no water will be able to strike the
plate