(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A truck covers 45.0 m in 8.50 s while smoothly slowing down to a final speed of 2.20m/s

a. Find its original speed

b. find its acceleration

2. Relevant equations

average velocity=xf-xi/change in t

average acceleration=vf-vi/chang in t

final velocity=vi+at

3. The attempt at a solution

____________________________

0 8.5 s

2.20m/s

x-2.20m/s/(8.5-0s)

I know that the entire distance is 45.0 m. I don't think I can use any of the three formulas mentioned above, but I'm not sure which other one I could use. Could someone please show me what formula I need or give me a hint, please?

Thank you very much

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# Homework Help: Speed and acceleration

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