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Physics · WORK, ENERGY AND POWER
हिन्दीAn ideal massless spring of force constant \( k \) is attached to a rigid wall and rests on a smooth horizontal surface. When the spring is pulled outwards to an extension \( x_m \), the work done by the spring force \( W_s \) is:
Correct answer · Option 3
\( -\frac{1}{2}kx_m^2 \)
Explanation
The work done by the spring force is \( W_s = \int_0^{x_m} (-kx) dx = -\frac{1}{2}kx_m^2 \).
