Question

If the Velocity Ratio(V.R) of a simple machine is more than that of a Mechanical Advantage(M.A), then which one of the following choices is the best suit?

• A. Efficiency remains same.
• B. Efficiency becomes zero.
• C. Efficiency reduces.
• D. Efficiency becomes greater than 80%.

Answer 1

The correct option is C

Efficiency reduces.

Since, efficiency E of any simple machine is given by,

E = $\frac{MA}{V.R.}$

It is clear that, if V.R. > MA, then the efficiency is less or reduces for the given pair of load and effort.