A crowbar of length 120 cm has its fulcrum situated at a distance of 20 cm from the load. Calculate the mechanical advantage of the crowbar.

Solutions:

According to the question,

Total length of a crowbar is120 cm

Load arm is of length 20 cm

Effort arm then becomes = 120 – 20 = 100 cm

We know that the expression for Mechanical advantage is –

M.A. = Effort arm / Load arm = 100 / 20

Therefore, M.A. = 5