Question

What do you mean by MA Of a lever is 3, VR of A lever is 4 and n of a Machine is 60%?​

Answer 1

Answer:

MA of lever is 3 means that the applied force can lift 3 times heavier load using that machine.

VR of a lever is 4 means the effort has to move 4 times more distance than that of load distance to lift any load up to certain height.

efficiency of 60% means that 40% of energy is wested due to friction, heat energy.