- #1
lamefeed
- 14
- 3
A person runs 100 m in 11.8 s. She had constant acceleration the first 3.0 s and after that she had constant speed(velocity if you will)
s=vt
v = v0 + at
s= v0t + 1/2at^2
2as = v^2 – Vo^2
I have tried a bunch of times but I seem to get it wrong every single time. This has given me a small headache the last couple of hours.
[itex]s(100)=\frac{1}{2}*a*3^2*t[/itex]
[itex]a=\frac{100}{9/2*11.8}[/itex]
Hope anyone can make sense out of this and give me a explanation on how to get the correct answers.
The correct answers is in the spoiler
s=vt
v = v0 + at
s= v0t + 1/2at^2
2as = v^2 – Vo^2
I have tried a bunch of times but I seem to get it wrong every single time. This has given me a small headache the last couple of hours.
[itex]s(100)=\frac{1}{2}*a*3^2*t[/itex]
[itex]a=\frac{100}{9/2*11.8}[/itex]
Hope anyone can make sense out of this and give me a explanation on how to get the correct answers.
The correct answers is in the spoiler
a = 3.24m/s^2
v=9.71m/s
v=9.71m/s