Answer to Question #234376 in Mechanics | Relativity for martin

Question

who is faster? mike driving at 20.0m/s or john driving at 20.0km/h

Answer 1

$v_{mike}=20\frac{m}{s}$

$v_{john}= 20\frac{km}{h}$

$1km = 1000m; 1h=3600s$

$v_{john}= 20\frac{km}{h}=\frac{20*1000}{3600}\frac{m}{s}\approx5.56\frac{m}{s}$

$v_{john}<v_{mike}$

$\text{Answer: Mike moves faster than John. }$