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An athlete in the Olympic games covers distance of 100 m in 10 s. His kinetic energy can be estimated to be in the ranges :

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2 x 10³ J - 5 x 10³ J

2 x 10⁵ J-3 x 10⁵ J

200J - 500J

2 x 10⁴ J - 3 x 10⁴ J

answer is D.

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Detailed Solution

Approximate mass of athlete = 60 kg , Velocity $= \frac{100 m}{10 s} = 10 m / s$
Kinetic energy = $\frac{1}{2} {mv}^{2} = \frac{1}{2} (60) (10)^{2} = 3000 J$

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