Confusion with a deceleration equation?

[d unknown03]

Hi I was wondering if there are any other equations for deceleration/acceleration other than

(v1-v0)/deltat

with just those variables. I've wrote it in code in Eclipse C++ like that and the deceleration value I am suppose to get doesn't come out.

Trial values are v0=12km/hr, v1=9km/hr, and delta t=60sec.

I am suppose to get an answer of 0.01388 but by plugging in those values I get 0.05. This is part of one of my assignments and I was wondering if anyone has any hints as to what I may be doing wrong. Thanks!

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post your code and we can try to help

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Your values are both wrong. Your result should be -180 km/(s^2). You are most likely not converting seconds to hours as you need to (or converting hours to seconds if you wish to convert the velocities instead).

[d unknown03]

yea I forgot to convert from km/hr to m/s, now I feel dumb. If there were people at my school to help and tell me this it would be alot more easier, your help is greatly appreciated! Thank - you!

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It's cool, we've all been there. Post if you have any more problems.

Remember, dimensional analysis is your friend!