Recent content by kostantina

Thank you for the response. It makes sense now. Will do further research on this to make sure I understand.

Homework Statement So I am calculating torque and power for a disk of radius 0.5 m that is subjected to a force of 50 N at its periphery and is rotating at angular velocity of 100 rad/s. Find torque and power.[/B]Homework Equations Torque= radius x Force = 0.5m *50N = 25Nm Power= dW/dt=...

Thank you, makes sense now. Wish I'd asked earlier.

Homework Statement I'm trying to follow a solved example in the book. I understand everything except one "trivial" (for most of you) analysis of the tangent velocity vector v_b. Because v_b is unknown it is written as its magnitude times the direction it follows constrained in a circular...

Homework Statement Oscillation in mechanical structures can often be described by the function: y(t)=(e^(-t/τ))*sin(ωt+θ) Where t is time , ω is oscillation frequency in radians per unit time. The oscillations have a period of 2*π/ω and their amplitudes decay in time at a rate...

Yes, we were told in class that result will be negative. And the most negative leads. So everything just contradicts here. This approach solved all the previous examples I tried. Now it all gets negated? Graphically how can you tell which one leads and which one follows? Its an angle 210...

I did and according to my lectures i_2 should lead. +x axis is the +cos(wt) and the -y axis is the +sin(wt) So i_1 = cos(377t+145) is in the II quadrant, and i_2=5cos(377-65 is in the IV quadrant). we start from the cos(wt) axis which is the + x-axis and go counterclockwise for polar angle so...

Find the phase angle between i_1= - 4 sin(377t+55) and i_2= 5 cos(377t-65) The Attempt at a Solution Ok, so I converted i_1= 4 cos(377t+145) and i_2=5cos(377t-65) According to lectures in class the 'most' negative leads. So in this case i_2 leads by -65-145=210. However, if you look at the...

Thank you. I m new to this topic so I appreciate your feedback on something that may seem simple to most of you in here.

I am trying to follow examples solved by the publisher of my book in order to understand the problem. However, I can't understand why he is solving it like this. What is confusing me, is why v1=(12+8)*1/8 why is v1 not 12*(1/8). Why is he adding the 8ohm resistor in there? Any help would be...