Recent content by ltnghia1304

Yes I used the sum of moments. Actually I also haven't get the point of this problem. Just think that it will be balance like that

Homework Statement I want to find the angular frequency of the system below Homework Equations F = -kx U = 1/2*k*x^2 The Attempt at a Solution But here's the answer: I don't know how come this solution. Any one help me? Thank you so much.

Homework Statement How can we find the open circuit voltage of this one: Thank you Homework EquationsThe Attempt at a Solution