I'm sure that I have all the answers right except for number 5 and number 10. http://i68.photobucket.com/albums/i15/monkey13330gg/scan0001.jpg http://i68.photobucket.com/albums/i15/monkey13330gg/scan0002.jpg On number 5, I think the answer is either B or E. I think it is B because if the cart is already in motion when the timer starts, then the graph would start on the y-axis instead of all the way over to the right. I also think that the answer is E because the distance between the graph and the y-axis indicate the friction that the force have to overcome to be able to make the cart go. For number 10. Somehow my answer does not seem right. I have E as an answer because the only thing I could get out of that graph is acceleration. Please check on these two problems (number 5 and 10) and do any problem that you are interested in. Thank you very much.