9,8 metri/secunda= (9,8:1000 kilometti)/ (1:3600 ore)=
=9.8 *3600/1000=9,8*3,6=35,28 km/h
deci 1m/sec = 1*3,6 km/ora asta TII MINTE
pt ca (1/1000) : (1/3600) = (1/1000)*(3600/1)= 3600:1000=3,6
atunci 19,6 m/s= 19,6*3,6 km/ora =70.56km/h
39.4 m/s= 39,4*3,6 km/h=141.84km/h