A crowbar of length 1.0 m has its fulcrum at a distance of 0.2 m from the load. The mechanical advantage of the crowbar is:

4

Reason —

Given,

• Total length of crowbar = 1.0 m
• Fulcrum distance from the load = Load arm = 0.2 m

Crowbar is a class I lever shown below :

Now,

Effort arm = Total length of crowbar - Load arm = 1.0 - 0.2 = 0.8 m

As,

$\text {Mechanical Advantage (MA)} = \frac {\text {Effort arm}}{\text {Load arm}}$

$= \frac{0.8}{0.2}$ = 4

So, mechanical advantage of the crowbar is 4.