simone Logour Introductory Physics Main Course Conte O Timer Notes è Evaluate @

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simone Logour Introductory Physics Main Course Conte O Timer Notes è Evaluate @ Feedback-Print 6 Info ially at rest on a straight road. The histogram below shows the car's car acceleration along that road as a function of time. -1 -2 -3 8 1 2 345 678 9 18 11 12 13 14 Tise (s) Calculate the speed of the car at t 3 s 5.00 m/s You are correct. Your receipt no. is 169-9129 Previous Tries Calculate the distance traveled during the first 5 s 5.0 m Submil Answer) Incorrect. Tries 8/20 Previous Tries Calculate the distance traveled from t-11 s to t-14 s. Incompat ble eitsi Ng cotyersion found between Submit Arswer "m/s" and the required units. Tries 0/20 Previo Calculate the car's average speed from t = 5 s to t-9 s 5.0 m/s Submission not graded. Use more digits. Tries 0/20 Previous Tries Threaded View Chronological View Other Views. Export My general preferences on what is marked as NEW Mark NEW posts no longer new NEW Last Two Parts Dhiral S Patel Reply (Tue Sep 11 04:03:47 pm 2018 (EDT) I am struggling to get the last two parts of the question done. I have gotten the distance and velocity up to 6 seconds. I don't know how to do last two parts. Any advice? NEW Re: Last Two Parts Corey Musolff Reply. (Tue Sep 11 09:27:39 pm 2018 (EDT)) The last pa rt requires knowing the position at each time. I suggest watching the lecture titled

Explanation / Answer

2] distance travelled in first 5 sec = d1+d2+d3+d4+d5

using second equation of motion,

d = 0 + 0.5*2*1^2 + [2*1 + 0.5*3*1^2] + [5*1] + [5*1+0.5*-2*1^2]

= 13.5 m

3] distance travelled in 11-14s = v*t = [2+3-3+3-2]*3 = 9 m

4] Average speed for 5-9 s = [sum of average speed in each sec]/[9-5]

= [2.5 + 3 + 4.5 + 4.5]/4

= 3.625 m/s

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