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STD 11 - 5. work,energy,power and collision — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 5. work,energy,power and collision4 Marks
Question
A block of mass $m$ is pushed against a spring whose spring constant is $k$ fixed at one end with a wall. The block can slide on a frictionless table as shown in figure. If the natural length of spring is $L_0$ and it is compressed to half its length when the block is released, find the velocity of the block, when the spring has natural length
✓

Answer

The energy stored in the spring when it is compressed to $\frac{\mathrm{L}_{0}}{2}$ is converted into kinetic energy of the block

$\frac{1}{2} m u^{2}=\frac{1}{2} k\left(\frac{L_{0}}{2}\right)^{2}$

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