Potential Energy `U(x)` and associated force `F(x)` bears the relation `F(x)=-(d)/(dx)U(x)`.
Dependence of potential energy of a two`-`particle system separation `x` between them is shown in the following figure.

Which of the following graphs shows correct variation in assoicated force `F(x)` with `x`?

Options

A.
B.
C.
D.

Answer

B

Explanation

`F(x)=-(dU(x))/(dt)=-`slope of `U (v)//(s)x` curve
Intially slope is constant and then it becomes zero.