Question

A uniform metre rule of mass 100g balance the 40cm mark when a mass x is placed at the 20cm mark

what is the value of x​

Answer 1

X = 50 g

Step-by-step explanation:

Please see attached photo for explanation.

From the attached photo,

Anticlock–wise moment = X × 20

Clockwise moment = 100 × 10

Anticlock–wise moment = clockwise moment

X × 20 = 100 × 10

X × 20 = 1000

Divide both side by 20

X = 1000 / 20

X = 50 g

Therefore, the value of X is 50 g