Question

A pulley system has 7 pulleys in all and lifts a load of 800N. Calculate i) V.R ii) M.A iii) Efficiency iv) Weight of movable parts of pulley
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Answer 1

Answer:

ANSWER

As we know that efficiency (η) =velocity ratiomechanical advantage

Mechanical Advantage(M.A) =effortload=10004500 = 4.5

Velocity Ratio(V.R) = No. of pulleys used = 5

Therefore efficiency η =54.5×100% = 90%

Answer 2

Explanation:

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