I have real trouble with these all of the time, and I have my midterm tomorrow so Im basically just looking up a lot of stuff on these forums to help me study (works great!) But i hate these graphs. Always have. Just a few basic questions if anyone can help answer them cause I Did these in class but forget how I did them...I tried various ways and still cant come up with an answer. Here's a pic of the graph:(adsbygoogle = window.adsbygoogle || []).push({});

http://img98.imageshack.us/img98/8224/graph1cv.jpg [Broken]

How do I determine average acceleration, displacement during first 4 seconds, displacement from 4sec to 7sec, and determine whether the object will arrive at its starting position??? All I know about this is area under the curve. But I have NO idea when to use that. Sorry for not showing any work but I'm really stumped on these. Even little hints to get me workin on it will be appreciated, thanks.

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# Velocity vs Time Graph

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