Physics-
General
Easy

Question

Sand falls vertically at a rate of 50 kg/s from a stationary hopper on a horizontal conveyor belt moving at a speed of 1 m/s as shown in fig. If belt is perfectly inelastic, then what is the minimum power output of the engine which drives the belt with speed v = 1m/s

  1. 50 watt    
  2. 25 watt    
  3. 100 watt    
  4. none of these    

The correct answer is: 50 watt

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