Question

When we want to use a machine as a force multiplier, which class of lever should we preferably use? Give a simple diagram of such a lever.

Answer 1

Though we can use either levers of class I or class II, for multiplying force, we should preferably use a lever of class II. This is because the mechanical advantage of levers of class II, is always greater than one. A simple diagram of a lever of class II is shown alongside. The wheel barrow, the bottle opener and the mango cutter are some of the practical forms of lever of class II.