Question

$\left(i\right)$ Give the expression for mechanical advantage of an inclined plane in terms of the length of an inclined plane.
$\left(ii\right)$ Name a common device where a gear train is used.

Answer 1

$\left(i\right)$ Mechanical advantage of an inclined plane
$=\frac{lengthofinclinedplane\left(l\right)}{verticalheightofinclinedplaneatthetopend\left(h\right)}$
$M.A=l/h$
$\left(ii\right)$ Watch is the common device where a gear train is used.