Question

Give one example each of a class I lever where mechanical advantage is (a) more than one, and (b) less than one.

What is the use of the lever if its mechanical advantage is less than I?

Answer 1

(a) More than one: shears used for cutting the thin metal sheets.

(b) Less than one: a pair of scissors whose blades are longer than its handles.

When the mechanical advantage is less than 1, the levers are used to obtain gain in speed. This implies that the displacement of load is more as compared to the displacement of effort.