Please help me! I got the answer -12 for #1 and -0.5 for #2, but the computer's telling me these are wrong (it's an online worksheet). I don't understand why?
Consider the plot below describing the acceleration of a particle along a straight line with an initial position of 10 m and an initial velocity of 9 m/s.
http://img93.imageshack.us/img93/5492/grapho.jpg
1. What is the velocity at 7 s?
2. What is the position at 7 s?