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What do you mean by MA of a lever is 3 , VR of a lever is 4 and efficiency of a machine is 60%​
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What do you mean by MA of a lever is 3 , VR of a lever is 4 and efficiency of a machine is 60%​

User Martinhans
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Explanation:V.R of a lever is 3 means effort distance of the lever is 3 times more than the effort distance of the load. ... Efficiency of a lever is 60% means 40% of the energy is wasted due to friction as no machine is Friction less.
User Antishok
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