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An athlete in the Olympic game covers a distance of 100m in 10s. His kinetic energy can be estimated in the range?

(a) 200J – 500J

(b) 2×10^5J – 3×10^5J

(c) 20000J – 50000J

(d) 2000J – 5000J

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The correct option is (d) 2000J – 5000J

Explanation: Average speed of the athlete, v = s/t = 10m/s

Assuming the mass of the athlete to 60kg, his average kinetic energy would be

K = 1/2×60×10^2

K = 3000J.

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