Question

What is the IMA of the following pulley system? 1 2 3 4

Answer 1

The answer is 2

I did this question today on my Odyssey ware, and I believe the explanation is that each supporting rope increases the IMA by 1

Answer 2

Answer:

IMA of pulley system is 3

Explanation:

The full form of IMA is ideal mechanical advantage. It is also defined as the ratio of output force to the input force. The mathematical expression is given by :

$IMA=\dfrac{F_r}{F_e}$

For the pulley system, the IMA is equal to the number of ropes present in the pulley - mass system. So, it is quite easy to find IMA of the pulley i.e. just counting the number of ropes present in the system.

In the given figure, there are three ropes in the system. Hence, its IMA is 3.