Recent content by grekin

Homework Statement The block at C is moving downward at vc = 4.8 ft/s. Determine the angular velocity of bar AB at the instant shown. Homework Equations x = cross product r = distance to point from frame of reference Boldface will indicate vectors v = ω x r vB = vA + ω x rB/A =...

Not sure I follow what you're saying, I just did what I was comfortable with and knew would work.

I changed to a current so I could find the equivalent resistance across all three resistors, not just the 12kΩ and 68kΩ. The resulting circuit was much simpler than just combining the resistors in parallel. Good to know. I submit the answer I posted earlier which turned out to be correct...

I think I understand what you're saying. So far I've found the equivalent resistance of the 3 resistors using source transformation (with the switches closed obviously), then left the circuit in the form: To find the voltage across the capacitor and resistor using V=IR. I got V=102.5 Volts...

I know that much, but I'm not exactly sure where that fits into my equation.

Homework Statement In the circuit shown in the figure, both switches operate together; that is, they either open or close at the same time. The switches are closed a long time before opening at t=0. (Figure 1) How many microjoules of energy have been dissipated in the 12 kΩ resistor 22ms...

It specifically asks for 2 significant figures. I could try 0.0025 A but I'm not sure if it'll make a difference, usually it accepts the answer if you're only a tad off. I'll probably end up talking to my professor about it tomorrow, because this seems like the correct answer. EDIT: I took...

So I guess both my signs were mixed up then, which sounds right but my problem with that is it gives me 0.0026 A for I_BD, which I had put in earlier and it said I was wrong.

I think I see my mistake, but I just want to be sure before putting in an answer because I'm on my last attempt. I believe I mixed up the sign with the current source removed, so it should be -0.0054 A and the total I_BD should be -0.0134. Does this sound correct?

Homework Statement Assume that I = 22mA , V = 6.0V , and R = 350Ω. Determine the current between B and D using the superposition principle. Homework Equations V=IR Superposition Principle G=1/R Voltage and Current dividers KCL, KVL The Attempt at a Solution I_BD = I_BD' +...

I understand what you're saying, and it does seem like a much simpler approach than what I had come up with. However, I'm still not getting the correct answer. I believe I solved the part where the voltage source is shorted correctly: 100*300/(100+300) = 75. Applying the current divider, I...

Homework Statement Assume that I = 22mA , V = 6.0V , and R = 350Ω. Determine the current between B and D using the superposition principle. Homework Equations V=IR Superposition Principle G=1/R Voltage and Current dividers The Attempt at a Solution I think I'm understanding the...

Thanks for the response, but it seems you opened the page before I made my edit. I figured it out after looking over my equations for a bit, thanks anyway though. You are indeed correct.

Homework Statement Use the mesh-current method to find the power developed in the dependent voltage source in the circuit in figure (Figure 1) if v = 29V. Homework Equations ∑R in mesh 1 * i_1 - ∑R in common between meshes 1 and 2 * i_2 = v_source in mesh 1 ∑R in mesh 2 * i_2 - ∑R in...

Ah, I see now. I didn't realize I had to include the resistors between each node as also connected to it individually. 1: 6.2 = v_1 * (1/40+1/8) - v_2 / 8 2: -1.5 = v_2 * (1/80 + 1/120 + 1/8) - v_1 / 8 Ended with v_1 = 114.7 and v_2 = 88 (which is correct). Thanks.