A ball is released from rest at a height of above the ground

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A 0.5 kg0.5\,\text{kg} ball is released from rest at a height of 2 m2\,\text{m} above the ground. Ignore air resistance and take g=10 m/s2g = 10\,\text{m/s}^2. What is its speed just before it strikes the ground? (a) 9.8 m/s9.8\,\text{m/s} (b) 4.5 m/s4.5\,\text{m/s} (c) 6.3 m/s6.3\,\text{m/s} (d) 20 m/s20\,\text{m/s}

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