AIPMT PRELIMS2006Physics-Mechanics
AIPMT PRELIMS 2006 Physics Elasticity MCQ Question
Type: MCQ-numerical-Easy-Class 11
The potential energy of a long spring when stretched by 2 cm is U. If the spring is stretched by 8 cm the potential energy stored in it is:
A
4U
B
U/8
C
16U
D
U/4
Correct Answer
Option C
Detailed Explanation
The potential energy stored in a spring is proportional to the square of the extension. If the extension is increased from 2 cm to 8 cm, the energy increases by a factor of (8/2)² = 16.
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