An object of mass has kinetic energy

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

Problem

An object of mass 4 kg4\,\text{kg} has kinetic energy 50 J50\,\text{J}. What is its speed? (a) 3.5 m s−13.5\,\text{m s}^{-1} (b) 10 m s−110\,\text{m s}^{-1} (c) 5 m s−15\,\text{m s}^{-1} (d) 7 m s−17\,\text{m s}^{-1}

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