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Sand particles drop vertically at the ra...

Sand particles drop vertically at the rate of `2kgs^-1` on a conveyor belt moving horizontally with a velocity of `0.2ms^-1`.
The extra force required to keep the belt moving is

A

0.4 Newton

B

0.08 Newton

C

0.04 Newton

D

0.2Newton

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The correct Answer is:
A
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