Sand drops from a stationary hopper at the rate of 5 kg s^(-1) on to a conveyor belt moving with a constant speed of 2 m s ^(-1) . What is the force required to keep the belt moving and what is the power delivered by the motor moving the belt ? [ Hint: Tangetial force exerted on the belt = u_("rel") (dM)/(dt) where u_("rel") is the tangential relative velocity of the sand .]

Sand drops from a stationary hopper at the rate of 5 kg s^(-1) on to a

1.	Sand drops from a stationary hopper at the rate of 5 kg s^(-1) on to a conveyor belt moving with a constant speed of 2 m s ^(-1) . What is the force required to keep the belt moving and what is the power delivered by the motor moving the belt ? [ Hint: Tangetial force exerted on the belt = u_("rel") (dM)/(dt) where u_("rel") is the tangential relative velocity of the sand .]
Answer» ANSWER :10 N , 20 W