1.

Gravels are dropped on a conveyor belt at the rate of 0.5 kg/sec. The extra force required in newtons to keep the belt moving at 2 m/sec is                                 [EAMCET 1988]

A.                         1                     
B.                         2            
C.                         4                     
D.                         0.5
Answer» B.                         2            


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