JEE Main2008PhysicsWork, Power and EnergyActual
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
- A200 ~J -500 ~J
- B2 10^5 ~J -3 10^5 ~J
- C20,000 ~J -50,000 ~J
- D2,000 ~J -5,000 ~J
Correct answer
D. 2,000 ~J -5,000 ~J
Step-by-step solution
Approximate mass =60 ~kg Approximate velocity =10 ~m / s Approximate KE = 1 2 60 100=3000 ~J KE range 2000 to 5000 joule