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STANDARD Physics Potential Energy in Springs MCQ Question

Type: MCQ-conceptual-Medium-Class 11

When a long spring is stretched by 2 cm, its potential energy is U. If the spring is stretched by 10 cm, the potential energy in it will be

A

10 U

B

25 U

C

U/5

D

5 U

Correct Answer

Option B

Detailed Explanation

Potential energy in a stretched spring is given by U = 1/2 kx². If the spring is stretched from 2 cm to 10 cm, the ratio of the stretches is (10/2)² = 25. Therefore, the potential energy becomes 25 times the original, which is 25 U.

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