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Well, I am having trouble doing a big project that's due this monday. I can't get any of my formulas to work, and I so I used logic on a motion problem.

Here's my made up problem that I have to graph in Excel:

An object travels at 39m/s for 4 seconds and then slows down at a rate of -6m/s² for 6 seconds.

(Sorry the columns aren't that well aligned, I had to copy it from Excel)

Time, sec \ Position, m \ Velocity, m/s \ Acceleration, m/s2

0 ----------- 0 ----------- 0 ----------- 0

1 ----------- 39 ----------- 39 ----------- 0

2 ----------- 78 ----------- 39 ----------- 0

3 ----------- 117 ----------- 39 ----------- 0

4 ----------- 156 ----------- 39 ----------- 0

5 ----------- 189 ----------- 33 ----------- -6

6 ----------- 216 ----------- 27 ----------- -6

7 ----------- 237 ----------- 21 ----------- -6

8 ----------- 252 ----------- 15 ----------- -6

9 ----------- 261 ----------- 9 ----------- -6

10 ----------- 264 ----------- 3 ----------- -6

So..... I don't know any of the positions for sure after 4 seconds, or any of the velocities after 4 seconds. I just kind of used logic, it's pretty easy to follow what I did to find the positions and the velocities from 5-10 seconds. Are these right?

I can't get something that seems right when using my forumlas.... can you give me some forumals to find the position and the velocities?

(oh, and after reading this forums FAQ, Yes I have spent lots of hours on this project, and have gotten help from both my brother and dad, but I am not going to see them again before this project is due, so I really need some help)

THANKS A LOT!!!!!!

Here's my made up problem that I have to graph in Excel:

An object travels at 39m/s for 4 seconds and then slows down at a rate of -6m/s² for 6 seconds.

(Sorry the columns aren't that well aligned, I had to copy it from Excel)

Time, sec \ Position, m \ Velocity, m/s \ Acceleration, m/s2

0 ----------- 0 ----------- 0 ----------- 0

1 ----------- 39 ----------- 39 ----------- 0

2 ----------- 78 ----------- 39 ----------- 0

3 ----------- 117 ----------- 39 ----------- 0

4 ----------- 156 ----------- 39 ----------- 0

5 ----------- 189 ----------- 33 ----------- -6

6 ----------- 216 ----------- 27 ----------- -6

7 ----------- 237 ----------- 21 ----------- -6

8 ----------- 252 ----------- 15 ----------- -6

9 ----------- 261 ----------- 9 ----------- -6

10 ----------- 264 ----------- 3 ----------- -6

So..... I don't know any of the positions for sure after 4 seconds, or any of the velocities after 4 seconds. I just kind of used logic, it's pretty easy to follow what I did to find the positions and the velocities from 5-10 seconds. Are these right?

I can't get something that seems right when using my forumlas.... can you give me some forumals to find the position and the velocities?

(oh, and after reading this forums FAQ, Yes I have spent lots of hours on this project, and have gotten help from both my brother and dad, but I am not going to see them again before this project is due, so I really need some help)

THANKS A LOT!!!!!!

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