I am working on an engineering project for college and have run into an unexpected wall.(adsbygoogle = window.adsbygoogle || []).push({});

I thought that my approach would work, but I'm not sure if I am getting reliable results and wanted to check on the proper method.

I am trying to calculate how long it would take a mass to accelerate to a given speed from an initial speed with a set input force.

So basically I'm comparing two different situations-

v1 = 15 m/s v2 = 32 m/s

1) 140 kg 25 hp

2) 150 kg 27 hp

I need to see the differences in acceleration (the time it takes to accelerate or distance it takes to accelerate) so that I can size components accordingly.

Total distance and other variables like air resistance or friction are not important right now.

Using the different newton laws, kinetics equations, etc. I can find a general % difference but since time, distance, acceleration are always directly correlated, when I change one value the power requirements stay the same.

This site http://www.engineeringtoolbox.com/car-acceleration-d_1309.html does something close to what I am looking for, but my calculations are the same as they display, but their output gives different results

This site http://www.baranidesign.com/acceleration/acceleration.html applies the situation almost exactly, but their math is not stripped down enough for me to apply it.

I must be missing something simple, yes?

Let me know if clarification is needed.

Thanks

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# Hp vs weight; acceleration comparison

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