A disc is rotating freely about its axis. Percentage change in angular velocity of disc if temperature decreases by 20 °C is (coefficient of linear expansion of material of disc is 5 × 10 –4 /°C )
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
Sol. I ω = const. ⇒ ω ∝ ∝ 
∴ Percentage change in ω
= – (% change in I)
= – (2 × Δθ × 100)
= – (2 × 5 × 10 –4 × – 20 × 100)
= 2 %
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