Ok, I've been running over this problem for about an hour now, and I can't figure out where I'm going wrong. I'm a complete newb, so I'm sure it's something stupid, but I could use the help.(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

An object with an initial velocity undergoes constant acceleration. Position information was collected at 4 poins and is shown in the table. Using Y_{n+1}- Y_{n}= V_{n}t + (1/2)a_{y}t^{2}determine the acceleration and fill in each box.

edit : it screwed up my table, I hope it makes sense.

Point #; Time (s); Position (m); Average Acceleration (m/s^{2}

1; 0; 1; n/a

2; 1; 8; (answer here)

3; 2; 25; (answer here)

4; 3; 52; n/a

2. Relevant equations

Y_{n+1}- Y_{n}= V_{n}t + (1/2)a_{y}t^{2}

3. The attempt at a solution

Here's one attempt I tried.

25m - 8m = 7(1) + 1/2a_{y}(1)

a_{y}= 20

I've tried a few different attempts, I'm not sure I should show them all here. The problem I'm running into is that I think I need to plug in velocity figures, but I wasn't given any, so I messed around some, but the answers don't make sense, and aren't uniform.

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# Homework Help: Basic constant acceleration help

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