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An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Asked in AIEEE 2008 · Relating kinetic energy to momentum

• (1) 2,000 J - 5,000 J
• (2) 200 J - 500 J
• (3) 2×10⁵ J - 3×10⁵ J
• (4) 20,000 J - 50,000 J

Step-by-step solution

Why the other options are wrong

• (2) No single slip gives this decade; it would need a speed of about 3 m/s or a 7 kg athlete.
• (3) Comes from using the distance 100 m as the speed, which lands in this decade: 1/2×50×100²=2.5×10⁵ J.
• (4) No single slip gives this decade; it would need a sprint speed of about 30 m/s.

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