- #1

vryC0nfused

- 9

- 3

**TL;DR Summary:**A train on a level stretch of tracks, starting from a dead stop, steadily speeds up to 28 m/s in 2.0 minutes, and then slows to 18 m/s with a constant deceleration of 0.011 m/s^2. What is the average speed of the train for this whole thing (speeding up and slowing down)?

I know that if I take the direction of the train as going in the positive direction, then the average speed is the same as the average velocity. The answer is 22 m/s, but I'm not sure how to get to that conclusion since I feel like I'm not picking up on some key information.

*Mentor's note: Thread moved to homework forum.*

Last edited by a moderator: