Question:
A long string is stretched by 2 cm and the potential energy is V. If the spring is stretched by 10 cm, its potential energy will be
A long string is stretched by 2 cm and the potential energy is V. If the spring is stretched by 10 cm, its potential energy will be
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Spring potential energy varies as the square of extension.
Updated On: Mar 18, 2026
- V/25
- V/5
- 5V
- 25V
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The Correct Option is D
Solution and Explanation
Step 1: Potential energy of a spring is U = (1)/(2)kx².
Step 2: Ratio of extensions = (10)/(2) = 5.
Step 3: Hence, (U₂)/(U₁) = 5² = 25 U₂ = 25V
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