A block of mass 2 kg is attached to... |JEE Main 2025

JEE MAIN 2025

08-04-2025 S2

Question

A block of mass 2 kg is attached to one end of a massless spring whose other end is fixed at a wall. The spring-mass system moves on a frictionless horizont table. The spring's natural length is 2 m and spring constant is $200 \mathrm{~N} / \mathrm{m}$. The block is pushed such that the length of the spring becomes 1 m and then release At distance $x \mathrm{~m}(x<2)$ from the wall, the speed of the block will be

Select the correct option:

$10\left[1-(2-x)^2\right]^{\frac{1}{2}} \mathrm{~m} / \mathrm{s}$

$\left\lvert\, 10[1-(2-x)]^{\frac{3}{2}} \mathrm{~m} / \mathrm{s}\right.$

$10\left[1-(2-x)^2\right] \mathrm{m} / \mathrm{s}$

$10\left[1-(2-x)^2\right]^2 \mathrm{~m} / \mathrm{s}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution