Gravel is dropped on a conveyor belt at the rate of 2 kg/s. The extra force required to keep the belt moving at 3ms^(-1) is

Gravel is dropped on a conveyor belt at the rate of 2 kg/s. The extra

1.	Gravel is dropped on a conveyor belt at the rate of 2 kg/s. The extra force required to keep the belt moving at 3ms^(-1) is
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