Question

A uniform metre rule of mass 10g is balanced on a knife edge placed at 45cm mark. Calculate the distance of a mass 25g from the pivot​

Answer 1

The distance of a mass 25g from the pivot​ is 18cm

Step-by-step explanation:

Given

`m_1 = 10g`

`d_1 = 45cm`

`m_2 = 25g`

Required

Distance of m2 from the pivot

To do this, we make use of:

`m_1 * d_1 = m_2 * d_2` --- moments of the masses

So, we have:

`10 * 45= 25* d_2`

`450= 25* d_2`

Divide both sides by 25

`18= d_2`

Hence:

`d_2 = 18`