- #1
Irukandji
- 2
- 0
Hi guys,
i hope i find the right Sub-Forum. Can you please tell me if i calculated it right.
A car speed's up with 5 m/s² to a speed limit of 50Km/h. After it arrived the speedlimit it drives for 30s with the speed of 50km/h. After that it break with a negative acceleration 3.0m/s² to stop the car. How many time it need from start to stop?
My calculation:
(50km/h) : 3,6 = 13,9 m/s
first step:
t = v/a
t= 13,9m/s : 5m/s² = 2,8s
second:
t= 30s
third:
t= v/a =13,9m/s : 3m/s² = 4,6s
Now i add this
t1 + t2 +t3 = 2,8s + 30s + 4,6s = 37,4s
My result is 37,4s. Is this right or iam totally wrong?
i hope i find the right Sub-Forum. Can you please tell me if i calculated it right.
A car speed's up with 5 m/s² to a speed limit of 50Km/h. After it arrived the speedlimit it drives for 30s with the speed of 50km/h. After that it break with a negative acceleration 3.0m/s² to stop the car. How many time it need from start to stop?
My calculation:
(50km/h) : 3,6 = 13,9 m/s
first step:
t = v/a
t= 13,9m/s : 5m/s² = 2,8s
second:
t= 30s
third:
t= v/a =13,9m/s : 3m/s² = 4,6s
Now i add this
t1 + t2 +t3 = 2,8s + 30s + 4,6s = 37,4s
My result is 37,4s. Is this right or iam totally wrong?