Odpowiedź:
Dane:
[tex]v_{p}[/tex] = 0 m/s
t = 20 s
a = 0,45 m/s²
Szukane:
[tex]v_{k}[/tex] = ?
s = ?
Obliczenia:
[tex]v_{k} = v_{p}+ a*t[/tex] , [tex]v_{p}[/tex] = 0 m/s więc [tex]v_{k} = a*t[/tex]
[tex]v_{k}[/tex] = 0,45 * 20 = 9 m/s = [tex]9*\frac{3600}{1000}[/tex] km/h = 32,4 km/h
[tex]s = v_{p} * t + \frac{a*t^{2} }{2}[/tex] , [tex]v_{p}[/tex] = 0 m/s więc [tex]s = \frac{a*t^{2} }{2}[/tex]
[tex]s = \frac{0,45 *20^{2} }{2}[/tex] = 90 m = 0,09 km
