An athlete in the Olympic gamed covers a distance of `100 m` in `10 s`. His kinetic energy can be estimated to be in range.
(1) `200 J - 500 J`
(2) `2 xx 10^(5) J - 3 xx 10^(5) J`
(3) `20,000 J - 50,000 J`
(4) `2,000 J - 5,000 J`.

Explanation

Approximate mass of the athlete `= 60 kg`
Average velocity `= 10 m//s`
Approximate `K.E . = (1)/(2) mv^(2) = (1)/(2) xx 60 xx 10^(2) = 3000 J`
Range of `KE = 2000 J` to `5000 J`.