Question 3: Motion of a vertical plate A horizontal plate moves freely in the vertical along nearly-frictionless guide rails. A jet of water with cross- sectional area 30cm and mass flow rate 10kg/s is pointed at the underside of the plate and sprays outward in the plane of the plate, applying a net upward force to the plate. Assuming that the distance between the jet and the plate is short (so that the jet velocity is nearly constant with height) and the jet is open to the atmosphere, what is the mass of the plate, mp if the plate moves at a constant speed 5m/s? Vplate guide rails mp Ajet mjet mp= 60 kg ? X 0%