
#1
Sep1408, 10:08 AM

P: 3

1. The problem statement, all variables and given/known data
Karen lives 500 m from school travels to school in straight line. Starts out at time zero at rest and accelereates towards school with an acceleration of 2.0 m/s2 for 10 seconds. she then travels at constant speed for 5 seconds. she then slams on the brakes, coming to stop in 4 seconds. she throws her car in reverse accelereating back home at 5 m/s2 for 3 seconds and then travelling at constant speed for 4 seconds. and then slowing at constant acceleration to stop back at home she spends 20 seconds at home then she accelerates at 8 m/s2 for 3 seconds then travels to within 50 m of the school (which is 450 m) and slows to a stop at constant acceleration. QUESTION: Draw careful xt,vt and at graphs with all value calculated. 2. The attempt at a solution I've attached an excel document of my attempt at it. I basically recored the time known as well as its position/velocity/ or accel that was given in the problem. I don't really know how to fil in the blanks tho, and i'm not even sure if my timings are right. i also drew out the scenerio too but i can't scan it in. 



#2
Sep1408, 12:29 PM

P: 3

so i figured the first part out i don't need help with that but now i can't figure this out:




#3
Sep1408, 03:54 PM

P: 3

guys dont bother solvin this i kinda figured it out thx tho



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