Lösning 3.1:1
FörberedandeFysik
(Skillnad mellan versioner)
Rad 2: | Rad 2: | ||
- | b) <math>OA:</math> <math>v^2=v_0^2+2a\cdot s \rightarrow (10(m/s)^2=0+2(4m/s^2)\cdot OA(m) \Rightarrow OA=12,5 m</math> | + | b) <math>OA:</math> <math>v^2=v_0^2+2a\cdot s \rightarrow (10(m/s)^2=0+2(4m/s^2)\cdot OA(m) \Rightarrow OA=12,5 m</math><br\> |
<math>AB:</math> <math>s=v+\frac{1}{2}\cdot at^2 \Rightarrow AB=(10m/s)\cdot (6s)+\frac{1}{2}(3m/s^2)(6s)^2= 114 m </math><br\> | <math>AB:</math> <math>s=v+\frac{1}{2}\cdot at^2 \Rightarrow AB=(10m/s)\cdot (6s)+\frac{1}{2}(3m/s^2)(6s)^2= 114 m </math><br\> | ||
<math>OB=OA+AB=126,5m</math> | <math>OB=OA+AB=126,5m</math> |
Versionen från 22 december 2009 kl. 15.37
a) \displaystyle v=v_0+at=10m/s+3 m/s^2\cdot 6s= 28m/s
b) \displaystyle OA: \displaystyle v^2=v_0^2+2a\cdot s \rightarrow (10(m/s)^2=0+2(4m/s^2)\cdot OA(m) \Rightarrow OA=12,5 m
\displaystyle AB: \displaystyle s=v+\frac{1}{2}\cdot at^2 \Rightarrow AB=(10m/s)\cdot (6s)+\frac{1}{2}(3m/s^2)(6s)^2= 114 m
\displaystyle OB=OA+AB=126,5m