Question

2. A machine has an efficiency of 60%, If the machine is required to overcome a load of 30N with a force of 20N, calculate its mechanical advantage

Answer 1

η  =  M ₐ/V r =  L /E × Vr

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Answer:

Explanation:

Mechanical Advantage ( M ₐ)

The mechanical advantage of a machine is the ratio of the load to overcome the effort made.

If the load be  (L ) and the effort be ( E)

The mechanical advantage of the machine can be given by:  M ₐ= L /E

Velocity Ratio ( V r)

The velocity ratio of a machine is the ratio of the velocity or the displacement of the point of the effort to that of the load.

Efficiency  (η )

The efficiency of a machine is the ratio of the output energy of the machine to the input energy of the machine and this can be proved to be equal to the ratio of the mechanical advantage of the machine to the velocity ratio.