User:Alecm11

Hello, I`m a student at the Gisela-Gymnasium, Munich. I was born 1992 in Pegnitz.

= x(t)=x(0)+v*t = x=23cm = t=0.2s = v=50 cm/s

2.7 a=v/t a=(100km/h) : 3,87s a=7,1m/s2

2.8 a=v/t v=at v=0.5m/s2*20s v=10m/s

3.20 a)x=a/2*t2  a=v/t  t2=2x/a    t2=v2/a2  2x/a=v2/a2  a=v2/2x  a=(50km/h)2/2*200m  a=0,48m/s2

b)Fn=Fg*cosA Fn=342kN

Fr=Fn*µ Fr=51kN Fh=Fg*sinA Fh=34kN

Fa=m*a Fa=17kN

Fmot=Fr+Fh+Fa Fmot=102kN