A vertical ideal spring with spring constant hangs from the ceiling

PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

A vertical ideal spring with spring constant 75 N ⁣⋅ ⁣m−175\,\text{N}\!\cdot\!\text{m}^{-1} hangs from the ceiling. A 0.30 kg0.30\,\text{kg} block is attached to the spring while the spring is still at its natural (unstretched) length, and the block is released from rest. Ignore air resistance. What is the speed of the block after it has descended 0.060 m0.060\,\text{m}? (a) 0.88 m ⁣⋅ ⁣s−10.88\,\text{m}\!\cdot\!\text{s}^{-1} (b) 0.33 m ⁣⋅ ⁣s−10.33\,\text{m}\!\cdot\!\text{s}^{-1} (c) 0.53 m ⁣⋅ ⁣s−10.53\,\text{m}\!\cdot\!\text{s}^{-1} (d) 1.4 m ⁣⋅ ⁣s−11.4\,\text{m}\!\cdot\!\text{s}^{-1}

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