The water stream strikes the inclined surface of the cart. One-fourth of the discharge flows down the incline, and three-fourths flows up the incline. Assume steady flow, all within the vertical plane.

(a) If the discharge from the 50-mm-diameter nozzle is 0.04 m3 /s, please determine the rolling friction force f that is required to keep the cart moves to the right with a constant velocity of 2 m/s.

(b) If the discharge from the 50-mm-diameter nozzle increases to 0.08 m3 /s, and the rolling friction force f is still the same as in question (a), what is the new velocity of the cart?