A simple machine has a VR = 3. If the efficiency of the machine is 60%, find the effort needed to lift a load of 180N
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Explanation:
60 = MA/3 × 100
60 × 3 / 100 = MA
MA = 180/100
MA = .18
MA = E/L
.18 = E/180
E = .18 × 180
= 1.8 × 180
= 32.4
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