A circular water jet having a cross-sectional area of 20 cm² moves with a velocity of 30 m per sec and strikes tangentially a curved plate. The angle of curvature of plate at outlet is 125° with the X-direction. Assuming the plate to be frictionless, find the force exerted by the jet on the plate in X-direction: when the plate is stationary when the plate is moving in the direction of jet with the velocity of 20 m/sec