AIPMT MAIN 2008 Physics Newton's Laws of Motion MCQ Question with Solution

Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant velocity of v m/s will be

A

Zero

B

Mv newton

C

2 Mv newton

D

Mv/2 newton

Option B

The force required is given by the rate of change of momentum, which is Mv newton, as the mass flow rate is M kg/s and velocity is v m/s.

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