Mechanics11/Seite5/Loesung2.8

Lösung
a) $$a = \frac {\Delta v} {\Delta t} $$ ==> $$\Delta v = \Delta t * a $$

==> v1 = 20s * 0,5 m/s² = 10 m/s = 36 km/h

==> v2 = 40s * 0,1 m/s² = 4 m/s = 14,4 km/h

==> v1 + v2 = 50,4 km/h

--Kenny 12:21, 30 November 2007 (CET), --Marc 12:21, 30 November 2007 (CET)

b)

$$x(t)= \frac{1}{2}*a*t$$

$$x(20)= \frac{1}{2}*0,5\frac{m}{s^2}*(20s)^2 = 100m $$

$$x(60)= 540m $$

$$x(80)= 860m $$



x-Achse: $$\frac{t}{s}$$ y-Achse: $$\frac{x}{m}$$ --Max 12:24, 30 November 2007 (CET) --Gunacke 12:24, 30 November 2007 (CET)