- #1
nadino1992
- 2
- 0
Homework Statement
Jordyn throws an eraser at her teacher, it moves horizontally at 8m/s
Homework Equations
We were not given specific equations for this question, but since we are given two velocities, time, and are asked for average acceleration, i figured that maybe a=(V1-V2)/t might work.
The Attempt at a Solution
So, first i thought that i could use the equation above, and just plug in the given information, but then i figured that the eraser stopped when it hit the stick. So, it would go from 8m/s to 0m/s and then to 15m/s. I then used two equations (both being a=(V1-V2)/t). For the first, i used V1=8m/s and V2=0m/s; for the second, i used V1=0m/s and V2=15m/s. Since we have to find the average acceleration, i thought maybe i could average out both answers from the two equations. I doubt this works though, maybe it does, I'm not sure. It seems too simple. Especially because i don't know if it's right to use the same time for both equations. Also, i have absolutely no idea how this relates to vectors. If i had to add/subtract both vectors then i could have just drawn that, but they're two separate things. Please help and thanks so much!