The potential energy of a long spring when stretched by \(2~\text{cm}\) is \(U.\) If the spring is stretched by \(8~\text{cm},\) the potential energy stored in it will be:
1. \(16U\) 2. \(2U\)
3. \(4U\) 4. \(8U\)
Subtopic:  Elastic Potential Energy |
 75%
From NCERT
NEET - 2023
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A block of mass \(m\) is moving with initial velocity \(u\) towards a stationary spring of stiffness constant \(k\) attached to the wall as shown in the figure. Maximum compression of the spring is:
(The friction between the block and the surface is negligible).
                 

1. \(u\sqrt{\frac{m}{k}}\) 2. \(4u\sqrt{\frac{m}{k}}\)
3. \(2u\sqrt{\frac{m}{k}}\) 4. \(\dfrac12u\sqrt{\frac{k}{m}}\)
Subtopic:  Elastic Potential Energy |
 81%
From NCERT
NEET - 2022
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