Work, Power and EnergyVery Hard
Question
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
Options
A.200 J - 500 J
B.2 × 105 J - 3 × 105 J
C.20,000 J - 50,000 J
D.2,000 J - 5,000 J
Solution
Approximate mass = 60 kg
Approximate velocity = 10 m/s
Approximate KE =
× 60 × 100 = 3000J
KE range ⇒ 2000 to 5000 joule
Approximate velocity = 10 m/s
Approximate KE =
× 60 × 100 = 3000JKE range ⇒ 2000 to 5000 joule
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