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Started programming on a ZX spectrum in the 80's and have moved through Assembly, Turbo Pascal, C++, C#, Fortran. My main area of focus is engineering and scientific computing like numerical methods and 3D graphics.


Apr
5
revised How long does it take for an electric car to go from 0 to 60 mph?
added 4 characters in body
Apr
5
revised How long does it take for an electric car to go from 0 to 60 mph?
added 4 characters in body
Apr
5
revised How to deal with non fixed springs?
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Apr
5
answered How to deal with non fixed springs?
Apr
3
comment If I drop a leaf twice from the height of a tree in a completely controlled environment, will the trajectory in each case be the same?
And the initial conditions are subject to quantum mechanics and the uncertainty principle. You need both positions and momenta to completely define initial conditions, which you cannot. There are multiple initial conditions, all superimposed onto each other.
Apr
3
comment If I drop a leaf twice from the height of a tree in a completely controlled environment, will the trajectory in each case be the same?
Nope, because of Chaos Theory. Determinism is a fallacy.
Apr
3
comment The other side of the lever
@QuoraFeans Not weightless, but of known weight.
Apr
3
comment The other side of the lever
You have to know the weight on the hinge. Then you can deduce the weight on the other side.
Apr
3
comment Would box on the floor rotate?
Related: physics.stackexchange.com/a/41908/392
Apr
3
comment Why earth looks always flat when it is round
Is a common mistake to think that people thought of the earth as flat. There are references to a round earth that are at least 3000 years old.
Apr
3
comment How long does it take for an electric car to go from 0 to 60 mph?
Look into yaskawa.com/site/dmdrive.nsf/link2/MNEN-5JFQNV/$file/… for a horsepower vs. speed curve, which includes a constant power section after the constant torque section.
Apr
3
revised How long does it take for an electric car to go from 0 to 60 mph?
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Apr
3
comment How long does it take for an electric car to go from 0 to 60 mph?
For constant torque, $C_1 = 0$. See Edit 2 for more details.
Apr
3
comment How long does it take for an electric car to go from 0 to 60 mph?
If the electronics limit the torque, at some speed the will cease to do so, and the torque curve will start to drop. This may happen above or below 60mph. Just use $t = \int \frac{1}{a}\,{\rm d} v$, and $x = \int \frac{v}{a}\,{\rm d} v $ to get the solution you want for whatever acceleration function $a(v)$ you define.
Apr
3
comment How long does it take for an electric car to go from 0 to 60 mph?
That is fine. The answer provided is for acceleration with one gear. There is still a gear ratio connecting the wheel speed to the motor speed.
Apr
3
revised How long does it take for an electric car to go from 0 to 60 mph?
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Apr
3
revised How long does it take for an electric car to go from 0 to 60 mph?
added 152 characters in body
Apr
3
comment How long does it take for an electric car to go from 0 to 60 mph?
Well, I have edited the question, to include a) a linear torque curve and b) air resistance.
Apr
3
revised How long does it take for an electric car to go from 0 to 60 mph?
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Apr
3
comment How long does it take for an electric car to go from 0 to 60 mph?
An electric motor has usually a linear relationship between torque and rpm, but you have to consider also if the cars has gears or not.