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An athlete in the olympic games covers a distance of $100 \mathrm{~m}$ in $10 \mathrm{~s}$. His kinetic energy can be estimated to be in the range
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$2,000 \mathrm{~J}-5,000 \mathrm{~J}$
$2,000 \mathrm{~J}-5,000 \mathrm{~J}$
Approximate mass $=60 \mathrm{~kg}$
Approximate velocity $=10 \mathrm{~m} / \mathrm{s}$
Approximate $\mathrm{KE}=\frac{1}{2} \times 60 \times 100=3000 \mathrm{~J}$
$\mathrm{KE}$ range $\Rightarrow 2000$ to 5000 joule
Approximate velocity $=10 \mathrm{~m} / \mathrm{s}$
Approximate $\mathrm{KE}=\frac{1}{2} \times 60 \times 100=3000 \mathrm{~J}$
$\mathrm{KE}$ range $\Rightarrow 2000$ to 5000 joule
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