Question

☑100points☑

give full explanation..​

Answer 1

Another solution was r = 0. But that would be a silly

mistake that should not be done as force and potential

energy would be undefined (infinite).

It should also be noted that potential energy is

minimum at equilibrium (force is zero).

To find if the point of equilibrium is stable or unstable

take a second derivative of potential energy. If it positive

then potential energy is minimum (stable equilibrium)

and if it is negative then potential energy is

maximum (unstable equilibrium).

Answer 2

⭐《ANSWER》

$\huge\mathfrak\red {aNsWeR}$

↪At equilibrium , Fnet = 0

↪Thus here , for equilibrium,

〽Du/Dx = 0