Question

a meter stick is blnced on a knife edge at it centre.when 2 coins,each of 5 kg are put one on top of the othr at the 12.0 cm mark, the stick is found to be b,ced at 45.0 cm. wht is the mass of the mter stick .

Answer 1

Let the mass of the stick be m.

The weight of the stick acts at the 50 cm mark.

Therefore, for the stick to remain balanced.

(5 + 5) x (45 - 12 ) = (50 - 45)m

Therefore, 330 = 5m

Or, m = 66 kg