Recent content by unseeingdog

Is tightening the set screws on the coupling really enough to hold both shafts in place during rotation? Sorry if it's a stupid question but I feel as if I'm missing something here.

I'm building a small wind turbine and I'm trying to find a way to make the metal rod where the propellers are rotate the axle of a small motor. The diameter of the rod is 1/4" and the diameter of the axle of the motor is about 2 to 3 millimeters. This is more or less the design of the turbine...

Not really... Perhaps the rotation of each rotor would slow the others down?

Ok, now it should be there

Done. I've uploaded the sketch. Sorry if it's a little ugly though, I was just trying to show what I meant.

Could multiple, smaller rotors on a wind turbine (on the same shaft) be more effective than a single, larger rotor? Why do most wind turbines have only one big rotor? I was thinking about doing a science fair project on this topic, but I have been unable to find a conclusive answer to this...

Nevermind. It was a million times easier than I thought. I just had to do ##iR_2 = \frac q C##, ##i## being ##\ \frac {E}{R_1 + R_2}##. Thanks for the help.

I thought so because of the equation for the current, namely ##i =\left(\frac E R \right) (e^{-t/RC})##, but I suppose that one doesn't apply either, since it's derived from the other one I mentioned.

Are they equal? Wouldn't the voltage in ##R_2## eventually drop to 0 because of the current going down, or does that equation for the current also not apply?

Oh, great! Thanks.

Sorry, I'm trying to fix it. Something went wrong with the attachment

Homework Statement Homework Equations ##q = CE(1 - e^{-t/RC})##The Attempt at a Solution I assumed that, since the problem specifies that sufficient time has passed, it meant to say that enough time passed. thus making the exponential term in the equation go down to 0, and the charge in the...

I meant ##e_x## to be the coefficient of restitution. Sorry for not specifying. Anyways, I get it now. Thanks

So, say, if one of the bodies moves along the x axis, and the other moves with an angle of 120 with respect to the horizontal, one can write ##e_x = (v_2cos(120) - v_1)/(u_1 - u_2cos(120)## ?

I am currently studying collisions in high school and my teacher told us that, in order to calculate the direction of each object after a 2-body collision, we could change the values in the relative velocity terms of the equation of the coefficient of restitution to the components in x and y. Is...