Question

what effort is required to raise the load of 1000N in a frictional single movable pulley?​

Answer 1

Answer:

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%

Explanation:

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