# Gruppe A

a) Rechtswert: Zeit t , Hochwert: Ortskoordinate x

(1) t1
(2) t2
(3) t3
(4) t4
(5) Schall 1
(6) Schall 2
(7) Auto
(8) x0

# Schülerbeitrag

b)

x1= vs*$\frac {\Delta t}{2}$

$\Delta t$ = t2-t1 = 30s

x1= 240$\frac {m}{s}$*15s= 51m

x2= 170 m

$\Delta t$= 4,30s-0,80s= 3,50s

v= $\frac {\Delta x}{\Delta t}$= $\frac {119m}{3,50s}$= 34$\frac {m}{s}$

c)

x(t)= x0+v*t

x0= x-v*t

= x1-v*t5 = 51m-34$\frac {m}{s}$*0,80s= 24m

--Sayuri 13:09, 19 October 2007 (CEST)

--Lenny 13:07, 16 November 2007 (CET)

# Gruppe B, Schülerbeitrag

b)

x1 = vs*$\frac {\Delta t}{2}$

Nebenrechnung:
$\Delta t$ = t2-t1
$\Delta t$ = 2,80s-1,80s
$\Delta t$ = 1s

x1 = 340 $\frac {m}{s}$ * 0,5s
x1 = 170 m

x1 = vs*$\frac {\Delta t}{2}$

Nebenrechnung:
$\Delta t$ = t4-t3
$\Delta t$ = 4,95s-4,65s
$\Delta t$ = 0,30s

x2 = 340 $\frac {m}{s}$ * 1,5s
x2 = 51m

v = $\frac {\Delta x}{\Delta t} v = \frac {119m}{2,50s}$
v = 47,6$\frac {m}{s}$
v = 171$\frac {km}{h}$

c)
x = x0 + v*t
x0 = x - v*t
x0 = 170m - 47,6 $\frac {m}{s}$ * 2,5s
x0 = 60,52m

von Sofiya und Christina 11b