The fiqure above represents a block-and-tac..

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The fiqure above represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is 40 $^{o}$ , then the value of W is

28.0N

48.0N

288.0N

50.0N

Scalars And Vectors

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The fiqure above represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is ...