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 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...
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...