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Posted by **ashley** on Saturday, June 11, 2011 at 10:10pm.

What was the student’s average speed during this trip? Answer in units of mph

What was the student’s average velocity during this trip? Take your positive direction to be southbound on I -35.

- physics -
**bobpursley**, Sunday, June 12, 2011 at 5:30amdistance= 80+2*100=280

speed=distance/time

veloctiy= 80/time Southbound

- physics -
**ashley**, Sunday, June 12, 2011 at 2:51pmWould the time southbound be if I were to half 5.46? Or, I looked it up that it would take about 1 h 30 min from austin to san antonio.

I ended up taking 80mi/1.5h=53mph.

If thats not a good way to go about it, how do I figure out the time southbound?

- physics -
**ashley**, Sunday, June 12, 2011 at 10:23pmI also tried 180mi/51.3(t)=3.50877193h. Then i took 80mi/that answer to get 22.8mph. Is that the right approach?

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