Question

The correct relationship between mechanical advantage (M.A.), velocity ratio (V.R.) and efficiency $\left(\eta \right)$ is :

• A. none of these.
• B. M.A. $=\eta \times$ V.R.
• C. $\eta =$ M.A. $\times$ V.R.
• D. V.R. $=\eta \times$ M.A.

Answer 1

The correct option is B M.A. $=\eta \times$ V.R.

Option (a) is correct.

$\eta =\frac{L\times d_L}{E\times d_E}$

$=\frac{L}{E}\times \frac{1}{\frac{d_E}{d_L}}$

$=\frac{M\cdot A.}{V\cdot R.}$

$M\cdot A=\eta \times V\cdot R.$