Q.
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
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a
Mν newton
b
2Mν newton
c
mν2 newton
d
zero
answer is A.
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Detailed Solution
Force required, F=d(mv)dt=vdmdt=vMAs velocity is constant, henceMν newton
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