A dog runs down his driveway with an initial speed of 5 m/s for 9 seconds, then uniformly increases his speed to 10 m/s in 5 seconds.?
How long is his driveway?
I have my answer and I got my answer using the equation Δx = 1/2(Vo + Vf)t.
I got 97.5 meters however my teacher tells me its 77.5 meters. She isn’t that great of a teacher and she’s teaching AP Physics with a pre-med degree… Can someone with great experience give me a second opinion? Feel free to call me out if I’m wrong.