ENGG PHYS
Seminar_02_solutions.pdf

Note that a 2 pts no partial credit consider the

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Note that ࠵? ! = ࠵? ! . (a) [2 pts, no partial credit] Consider the following times: t = t 0 , t 1 , t 2 , t 3 . Does the particle pass through the same location at any two (or more) of those times? Circle Yes or No. If your answer is yes, list the times when you believe the locations are the same. Yes, at t 1 and t 3 YES _______________ NO The area under each section of the graph represents distance travelled in that time interval. The two shaded triangles have the same area.; the particle travels some distance d to the right during time interval t 1 – t 2 , and then travels the same distance to the left during time interval t 2 – t 3 . (b) [3 pts] Sketch the s-t (position vs. time) graph for the particle, assuming that it starts at s = 0 when t = 0. Mark and label the times t 1 , t 2 , t 3 on the horizontal axis. [0.5] s and t axes are labeled; t 1 , t 2 and t 3 are marked on the horizontal axis [0.5] s increases linearly from t = 0 to t 1 . [1] slope begins to decrease at t 1 , with s reaching a maximum at t 2 [1] curved portion is symmetric, with same s values at t 1 and t 3 [Labeling of s 1 , s 2 , s 3 is not required.]

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