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Grade: 11

                        

A sand clock filled with sand of mass M is kept on a weighing machine. The sand is allowed to fall at the rate of u=dm/dt then find the variation with time of the measured value of the weighing machine

29 days ago

Answers : (1)

sree lakshmi
73 Points
							
Amount of sand is a constant .but when sand fall to the lower compartment momentum of sand will change ,so extra force will be exerted 
So the force = weight +rate of change of momentum of sand
9 days ago
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