Recent content by Zamarripa

$$\frac{1}{2}m\frac{(s-x)}{l}\dot{x}$$ where ##m\frac{(s-x)}{l}## is the mass of the string in the horizontal

The string at the horizontal is also moving

Yes, but what about the contribution on the horizontal?

$$T=\frac{1}{2}mv^2$$

I've problems understanding why the kinetic energy of the string is only $$T_{string}=\frac{1}{2}m\dot{y} $$ Why the contribution of the string in the horizontal line isn't considered?

I want to know if my solution is correct: The velocity of the center of mass immidiately after m1 has moved is just vcm=m1v1 /(m1+m2) I thing that i have to consider the spring and the m2

The initial velocity is v1=p1/m and the problem is just a simple harmonic oscillation with initial conditions x(t=0)=x0, v(t=0)=v1?

The fig. 1.1(a) is a mass m attached to a spring that is fixed to a wall. I don't understand what does "a sudden momentum impulse" means. Is it an external force o what? I imagined that the new equation of motion would be md^2x/dt^2+dp1/dt-kx=0 md^2x/dt^2+mdv1/dt-kx=0 is this the equation i...

Homework Statement We have a mas m attached to a vertical spring of length (l+x) where l is the natural length. Homework Equations Find the Lagrangian and the hamiltonian of the system if it moves like a pendulum The Attempt at a Solution we know that the lagrangian of a system is defined as...

Hello everyone! I would like you to recommend me a book for relativistic quantum mechanics. It's for an undergraduated class. thanks

Hi, I have a homework of electromagnetism and I got stucked in a problem, can you help me, please? 1. Homework Statement Find the electric potential V(r) in the space produced by a density charge (rho) = (rho)0 e-(alpha) r In spanish: Enuentra el potencial V(r), en todo el espacio, producido...