fig 4 represents a block-and-tackle pulley system on which an effort of W newtons supports…

fig 4 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 system is 40% then the value of W is
  • A.
    28.0N
  • B.
    48.0N
  • C.
    50.0N
  • D.
    288.0N
Correct Answer: Option C
Explanation
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