User:CeryM11

Hello there, I'm a pupil of the Gisela Gym, munich I study physics with mr Oswald as my teacher. I'm 16 years old and like drawing and dancing. Hope you'll be nice to me ;-)

1.9 Rückwärtsgang

a)v=$$\frac {\Delta {x}} {\Delta {t}}$$ $$v=\frac {-168m} {12,5s}$$  $$v=-13.4\frac {m} {s}$$

b)$$x(t)=x_0+v*\Delta {t}$$ $$x(t)=168m-13.4\frac {m} {s} * 173s$$ $$x(t)=2.16\frac {km} {h}$$

c)$$t=\frac {x(t)-x_0} {v}$$ $$\frac {-6200m-168m} {-13.4\frac {m} {s}}$$ $$=473.8s$$

4.1: Brummi, Teil 2

c)$$ W_a =\frac {m} {2}* v^2 $$ $$17500kg * (13.89\frac {m} {s})^2 =3.4MJ$$

d1)$$ P=\frac {W} {t}$$  $$\frac {3375750J} {40s}=84393.75W=84.4kW $$

d2)$$ P=\frac {W_a +W_R} {t}$$  $$ 341.9kW$$

d3)$$ W_R =F_R *x=$$  $$10.3MJ$$

4.6: Energievergleich

a) $$ E_Kin=\frac {1} {2}m*v^2$$  $$ \frac {1} {2}*2000kg*13.9\frac {m} {s}=$$   $$ 193kJ $$

b) $$ E_Pot =m*g*h$$  $$ 1.9MJ $$

c) $$ E_Kin =\frac {1} {2}*m*v^2$$  $$ 2MJ$$

4.13: Bilderbuchstart

a)$$F=m*g=$$ $$1.77MN$$

b)$$p=m*v$$ $$890kg*5000\frac {m} {s}=$$  $$4450000$$

$$F=\frac {p} {\Delta {t}}=$$ $$4.45MN$$

c)$$a=\frac{F_S - F_G} {m}$$ $$\frac {(4.45-1.77)MN} {180000kg}=$$

$$15\frac {m} {s}$$