Question

A 1.0 metre wooden ruler is damaged and no longer uniform. The mass of the ruler is 11.5g. The ruler is balanced on a pivot with a 50g mass as shown.

Where is the centre of gravity of the ruler?

Answer 1

☝️

Use this method to solve your answer

Answer 2

Answer:T=r * f

let the mass of the ruler be m grams. The centre of the gravity of the ruler is at its centre. Therefore centre of mass of the ruler is 20 cm.

Explanation: