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anonymous
 one year ago
What is the average vector acceleration of a car that changes its velocity from 30km/h south to 40km/h east over a time of 5.0s?
anonymous
 one year ago
What is the average vector acceleration of a car that changes its velocity from 30km/h south to 40km/h east over a time of 5.0s?

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johnweldon1993
 one year ago
Best ResponseYou've already chosen the best response.1Hmm, kinda worded weird However..we know \(\Large a = \frac{\Delta v}{t}\) Since the velocity is changing directions as well...it wont simplify COMPLETELY! but that's okay \[\large a = \frac{40i  30j }{5.0}\] I hope you know that notation: "i" meaning in the xdirection and "j" meaning in the ydirection So that acceleration vector would be \[\large \vec{a} = 8i  6j\]

johnweldon1993
 one year ago
Best ResponseYou've already chosen the best response.1Which kinda makes sense if you think about it...the motion looks like dw:1443043644332:dw

johnweldon1993
 one year ago
Best ResponseYou've already chosen the best response.1If we look on a coordinate plane dw:1443043692012:dw

johnweldon1993
 one year ago
Best ResponseYou've already chosen the best response.1So the resulting vector would be down down (so j) and going right (so +i)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0shouldn't the j portion be negative and then you get 4030

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0And how would i give a numerical answer with an angle and km/h/s for velocity?
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