Recent content by henryd

So then it's just $$ \frac{dU^2}{dU}\frac{dU}{dt} = 2U\dot{U}$$ ?

Homework Statement I have the professor's solutions for a homework we handed in. There is a part that is confusing me. We have the following equation: $$E = \frac{1}{2}(m_1 + m_2)\dot{x}^2-(m_1-m_2)gx$$ Homework Equations We want to find: $$dE/dt = 0$$ The Attempt at a Solution...

Does it help if I have a pretty good estimate of ω? The signal would be: B + A\cos(\omega t + \phi) where B and A are constant

Is it possible to calculate the phase and signal amplitude from data gained from FFT? For instance, if I have a samples from a signal B+A*cos(ψ), is it possible to obtain A and ψ? Extra challenge: is it possible to do so without division? (I am looking to put this on a DSP and division is...