Question

A uniform metre rule has masses 20g and 10g hung at the 10cm mark and at the 30cm mark respectively . Calculate the value of m required to balance the rule horizontally

Answer 1

Answer 125

Explanation:

from Equilibrium,

clockwise moment=anticlockwise moment

W×15=75×g×25

m×g×15=75×g×25

∴=

15

75×25

=125g

Answer 2

This is the diagram of this question