Question

17. A uniform metre scale can be balanced at the
70 cm mark when a mass of 0.05 kg is hung
from the 94 cm mark. (a) Draw the diagram of
the arrangement and (b) find the mass of the
metre scale.​

Answer 1

Answer:

Explanation:

a)Diagram of the given arrangement is shown below.

b)As the given meter scale is a uniform scale. So its centre of gravity lies at 50 cm. Let mass of meter scale be W1 kg.

By principle of moments,

m₁x₁= m₂x₂

⇒m₁ x (70 - 50) = 0.05 x (94 - 70)

⇒ m₁  = 0.05 x 24/20  

= 0.06 kg. = 60 gm.

Answer 2

Answer:

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