Asked by Surafel

A pulley system with IMA of 4 requires a force of 15 New Ton tol lift a load of 45 New Ton. Find the efficiency of the machine
Answered by John
output work / input work then multiply by 100 to get the efficiency.
Answered by Anonymous
Ideal mechanical advantage = 4
so
ideally 45 Newtons weight requires 45/4 = 11.25 Newtons (NOT NEW TONS, named after Issac Newton) but it took 15 Newtons
so eff = 100 * 11.25 /15 = 75%
Answered by Honey
45 divided by 4 which is equal to 11.25 and 100 times 11.25 divided by 15 , we can get 75%
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