Recent content by Stingarov

That helps quite a bit. Thanks for the in-depth explanation. That's what I was looking for.

The assumption that it 2pi*ft = 90 (= 1 when computed in sin). I know the phase angle, and I know that v(t)=Vmax*sin(2pi*ft + phase angle), but that doesn't give me a logical pathway to i(t)=Imax*sin(2pi*ft - phase angle) nor describe why 2pi*ft = 90. In other words, my book does a poor...

It is indeed the signal. I tested this and it was correct. Thanks. However, I would like to know why this assumption is valid? It doesn't seem so apparent to me.

I don't see how I can use the reactances when I'm given neither the L or C values. I result in variables Lf or Cf either way, as the equations are XL=2pi*fL , and XC=(2pifC)^-1, respectively.

Kruum: It was not given in the problem; it *is* relevant in the next problem, but I don't think in this one. As far as the circuit goes, It is a simple: Generator----R----L----C----(return to Generator) circuit. berkeman: aside from putting amps where I should have put volts, I don't see...

Not so far.

Homework Statement Information given: Resistance=105 ohms, , XL= 212 ohms, XC= 93 ohms V rms is 143 Volts. Frequency of the circuit is f. Not defined. Information Solved for: Impedance (Z) = 158.7 I rms=.901 Amps Phase angle = 48.58 The final question, which I cannot...

Alright I figured it out surprisingly by conceptual thinking. Force: I/r 1) 1/2mr = 3.28855 2) * angular velocity = 3.28855 * 38.17 radians per second 3) 125.52 / F2 = time = 2.094

So Inertia = Solid cylinder = 1/2mr squared. I = .5 * 73.9 * .089 sq I = .293 Do I use the Net Torque = 0 from here? I'm still pretty lost for some reason from here.

A 73.9 kg shaft with a radius of 8.9 cm is spinning at a rate of 364.5 rpm. If a board leans against the outside providing a frictional force of 59.92 N, how long will it take for the shaft to stop rotating? Answer says 2.094 s. Problem I have is that my Inertia table doesn't list shaft...

Ah alright, thanks

Alright so I thought I understood this well. I'll give an example of how I solve for range and such with the given information: A ball is thrown from a height of 1.86 m, at a speed of 21 m/s and at an angle of elevation of 59.4o. How far from the person who threw it does the ball land...

Thanks guys, much appreciated.

I see where I went wrong now. Yeah it is easier completely in algebraic terms, interesting.

Im pretty much beyond lost on this and have no other examples given to go by, so if someone solved it or one like it as a guide, I wouldn't mind. If that is frowned upon on here, then my apologies.