Sand from a stationary hopper falls onto a moving conveyor

Last updated: 6/7/2023

Sand from a stationary hopper falls onto a moving conveyor belt at a rate of 5 00 kg s as shown in the figure The conveyor belt is supported by frictionless rollers and moves at a constant speed of 0 750 m s under the action of a constant horizontal external force Fext supplied by the motor that drives the belt y X F ext A The force of friction exerted by the belt on the sand is 3 75 N B The external force F is 3 75 N ext C The work done by F in 1 sec is 2 81 J ext D The kinetic energy acquired by the falling sand each second due to the change in its horizontal motion is 1 41 J