# Exercise 9 | Chemistry and the Scientific Method

Calculate the kinetic energy of sprinter (85.2 kg) moving at 38.0 km.h-1.

Ek$\frac{1}{2}$ mv2    with v = speed in m.s-1

38 km.h-1 =  x  x  = 10.6 m.s-1

Ek = $\frac{1}{2}$ x 85.2 x 10.62 = 4.79 x 103 J