ICSE Class 10 Physics 2017 Solved Paper
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A uniform half metre rule balances horizontally on a knife edge at29 cm 20 gf
SECTION - II
A uniform half metre rule balances horizontally on a knife edge at
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Question : 24
Total: 65
What is the weight of the half metre rule?
Solution:
Let the weight of half metre rule be ' W
According to the principle of moments,
Anticlock wise moments
= Clockwise moments
∴ W × 4 = 20 × 21
⇒ W =
= 105 gf
According to the principle of moments,
Anticlock wise moments
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