Solve the below problem:
Q: Sand falls from three hoppers onto a conveyor belt at a rate of 40 kg/s for each hopper. The sand hits the belt with a vertical velocity 1 v = 3 m/s and is discharged at A with a horizontal velocity 2 v = 4 m/s. Knowing that the combined mass of the beam, belt system, and the sand it supports is 600 kg with a mass center at G, determine the reaction atE.