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

Options

A. 200 J-500 J
B. `2xx10^(5)J-3xx10^(5)J`
C. 20,000 J-50,000 J
D. 2,000 J-5,000 J

Answer

d

Explanation

The average speed of the athlete
`V=(100)/(10)=10 m//s`
`:. K.E.=1/2mv^2`
If mass is 40 kg then,`K.E.=1/2xx40xx(10)^2=2000 J`
If mass is 100 kg then,`K.E.=1/2xx100xx(10)^2=5000 J`