Recent content by DallasStar

I understand the first part, but there you lost me :(. can somebody explain it in simpler words please? i feel like I am menatlly challenged right now :(

I am so confused

Thank you for your help. I got three equations now for the final velocity --> vf = 5+0.2t; for the displacement he accelerates for --> d = 5t+0.1t²; and for the displacement after he accelerated --> d = 5t + 0.2t². The next step i did was adding the two displacement equations because they should...

After several tries i finally figured out that 6.5 m/s is not the final velocity. The final velocity would be more than 6.5 since the runner needs time to accelerate from vi= 5 m/s; however how can I figure out the final velocity? which formula can I use? Thank you, Christian

Thank you, I understand now that his average velocity for the second part is 6.5 m/s, however when I am trying to calculate the distance he needs to accelerate as well as the time I get 7.5 s as an answer? What am I doing wrong?

Homework Statement A runner wants to run a 1500m race with an average velocity of 6.00m/s. After running the first 500 m, he notices that the elapsed time is 1 min 40 seconds. Panicking, he accelerates for "t" seconds at 0.20 m/s² and then finishes the race at his new faster speed. He makes...