Question

For a four bar linkage in toggle position, the value of mechanical advantage is

• A. 0.0
• B. 0.5
• C. 1.0
• D. $\infty$

Answer 1

The correct option is D $\infty$


${\omega }_4$ of the output link DC becomes zero at the extreme positions. The extreme positions of the linkage are known as the "Toggle position".

$\therefore$ Mechanical advantage
$=\frac{{\omega }_{\text{input}}}{{\omega }_{\text{output}}}\times {\eta }_{\text{mechanism}}$

$\because {\omega }_{\text{output}}=0$

$\therefore$ Mechanical advantage $=\infty$