Recent content by Chaso

Um no to dimensional analysis. And the bottom is not looking familiar at all. I understand why the moment about C is equal to I_G + m(R x a). I don't understand why in for point g in the example I linked in my first post, the moment about point g is only equal to I_g*alpha...

Yes, I meant moment of inertia sorry. So basically I'm learning this stuff in a dynamics class. For this subject it was under the chapter of general planar motion. So basically, in class my professor stated this equation: M_P (Moment about point P of an rigid body) = I_G (Moment of inertia...

No I meant kinetic moment. The moment of a point likes say c is equal to the kinetic moment of that point like angular acceleration*mass of inertia and acceleration*mass*distance

Hi I need some help explaining kinetic moment and moment of the center of mass. This is an example: http://session.masteringengineering.com/problemAsset/1529176/3/Hibbler.ch17.p107.jpg Okay I know that when you do moment equations: The Moment forces about some point is = to the kinetic...

So use K2 + U2 = K1 + U1 expansion to: (1/2)(Mc)(v2^2) + -(G)(Me)(Mc)/(R) = (1/2)(Mc)(v1^2) + -(G)(Me)(Mc)/(R2) R = Distance of neptune from sun R2 = 8.79 x 10^7 Is this what I do?

For r2, I use the radius from Neptune to the sun.

Homework Statement Comets move around the sun in very elliptical orbits. At its closet approach, in 1986, Comet Halley was 8.79 x 10^7 km from the sun and moving with a speed of 54.6 km/s. What was the comet's speed when it crossed Neptune's orbit in 2006? Homework Equations Mv1r1=Mv2r2...

Yes I'm using that one. The pins refer to the pins on the board. And I need to power everything with the battery. But I already know how to power the motor I don't kow how i can power the arduino.

the problem is I don't know how I can power it. I don't think the digital I/O plug can be used as a power source. So I don't know where the I/O pin 12 would go as well as where it would connect, with the resistor , along the circuit. Or How I can power the Arudino. Any Suggestions?

Homework Statement Arudino (UNO) is a Microprocessor. As 13 I/O pins and 8 digital pins and 6 PWMs. Homework Equations The Attempt at a Solution the problem is I don't know how I can power it. I don't think the digital I/O plug can be used as a power source. So I don't know where the I/O...

Hmm okay thanks for the wonderful help. I think I got the hang of this now. Hmm quick question would a fan be equivalent to a resistor?

Hmm okay that makes sense so how would I solve for I1 and I2 without Vr?

Hm okay that makes sense but why are we using Vr for the 2Ω to solve for the current of the other 2 resistors?

So what I did was I1 = (3V - 19/17V)/4Ω = 8/17A I2 = (19/17V - 2V)/10Ω = -3/34A I'm assuming Vr is universal from 2Ω to 4Ω and 10Ω. If not, how would I find Vr for the other resistors? using the same method just add them up?

Hmm okay so so Vr is universal to all the resistors then? That's why we find Vr with the 2Ω resistor and we can apply it to the other resistors? And to find the I in the 4Ω Resistor we subtract 3 by the Vr because 3 is flowing into it while Vr is flowing out and that's why its vice-versa for the...