Recent content by VictorH

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    Uncertanty in a non-linear regression with least squares method

    Alright. So, i measured the movement of a vibrating table with a LVDT sensor, the approximate frecuency is around 30 Hz and a sampling frecuency of 1000 samples per second. Hopefully i can show it behaves like a harmonic oscillator. I looked at tha data, the graph is pretty nice and definitive...
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    How does static friction do work?

    Why does work depend of the reference frame? If we do work isn't it the change of kinetic energy equal for all observers? The velocity vectors may change, of course, but the difference shouldn't for two inertial frames. Is it different for non-inertial frames?
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    Who knew finding Velocity could take so much Work and Energy?

    You may be looking at this problem harder than it has to be. First of all, consider the force applied to the ball. We have a constant weight pushing down vs an elastic, changing, force pulling up. Now, to do this problem following your approach, we would have to determine the total force on the...
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    Uncertanty in a non-linear regression with least squares method

    Homework Statement Ok, so I'm trying to fit a set of data (21000 points to be exact) to a sine function. Homework Equations Y = A*sin(ωt) The Attempt at a Solution I used NumPy to get the parameters A and ω with the least squares method. So far, so good. However, i appear to...