Thank your accurate concepts, which help me think more clearly
about the energy and motion.
I still have the problem about writing the formula or making assumption.
Could you please show me some initial formula about
the aforementioned potential energy change must equal the stored potential...
Homework Statement
Hang a heavy spring from it's top.
Let it hanging down naturally.
The total mass of the spring is M.
The spring constant of the spring is k.
Asking it's extension.
2. Homework Equations
Describing the potential energies( spring force energy or gravity)
with...
1. Homework Statement
(1) ** Show that a function f is continuous at a point c if and only
if for every sequence (xn) of points in the domain of f such that
xn ! c we have limn!1 f(xn) = f(c) = f(limn!1 xn).
(2) Let A be a non-empty subset of R. Dene A := fxjx 2 Ag.
Show the following...