A mass q of sand is discharged per unit time from a conveyor belt moving with a velocity v 0 . The sand is deflected by a plate at A so that it falls in a vertical stream. After falling a distance h...

A mass q of sand is discharged per unit time from a conveyor belt moving with a velocity v₀. The sand is deflected by a plate at A so that it falls in a vertical stream. After falling a distance h the sand is again deflected by a curved plate at B. Neglecting the friction between the sand and the plates, determine the force required to hold in the position shown (a) plate A, (b) plate B.