- #1
newman180
- 4
- 0
I am working on an engineering project for college and have run into an unexpected wall.
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
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