Question

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. Ans. 5​

Answer 1

Answer :-

5

Explanation :-

Given :

Length of crowbar => 120cm

Load arm => 20cm

To Find :

Mechanical advantage,MA = ?

Solution :

We know,

$\sf{}MA =\dfrac{effort\ arm\ length}{load\ arm\ length}$

[effort arm = length of the crowbar- effort arm]

$\sf{}\implies \dfrac{120-20}{20}$

$\sf{}\implies \dfrac{100}{20}$

$\sf{}\implies \dfrac{10}{2}$

$\sf{}\therefore 5$

Therefore,mechanical advantage is equal to 5