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How long will it take a car to go from a complete stop to 44 km/hr if they are accelerating at 5km/hr2?

 Oct 21, 2021
 #1
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\(\ddot x=5\\ \dot x = 5t\\ when\\ \dot x = 44\\ 5t=44\\ t=8.8 \;hours \)

 

I have not bothered with constants because when t=0, x=0 and v=0

 Oct 21, 2021
 #2
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vf = at

44 =  (5) t

44/5 = t = 8.8 hr

 Oct 21, 2021
 #3
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8.8 hours...........

Guest Oct 21, 2021

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