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

Answer:

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

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:

$d_2 = 18$