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.

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Solution

The crowbar is a class I lever as the fulcrum is situated in between the load and effort.

Here, load arm = 20 cm

Effort arm = 120 - 20 = 100 cm

So, $M A = \frac{E f f o r t a r m}{L o a d a r m} = \frac{100}{20} = 5$

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Mechanical Advantage in Lever

Standard X Physics

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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.

The crowbar is a class I lever as the fulcrum is situated in between the load and effort. Here, load arm = 20 cm Effort arm = 120 - 20 = 100 cm So, MA=Effort armLoad arm=10020=5

The crowbar is a class I lever as the fulcrum is situated in between the load and effort.

Here, load arm = 20 cm

Effort arm = 120 - 20 = 100 cm

So, $M A = \frac{E f f o r t a r m}{L o a d a r m} = \frac{100}{20} = 5$