Question

un corp franeaza cu a= 2m/s² pana la oprire (v=0) t= 10s . Sa se calculeze V0=? SI d=?

Answer 1

$v=v_0+at$, $v=0$, $a=-2$, $t=10$, deci $v_0=v-at=2*10=20$ m/s. Acuma $x=x_0+v_0(t-t_0)+a(t-t_0)^2$, unde $x=d$, $x_0=t_0=0$. Deci $d=v_0t+at^2=20*10+2*10^2=200+200=400$ metri.