Question

The potential energy `U` between two molecules as a function of the distance `X` between them has been shown in the figure. The two molecules are
A. Attracted when `x` lies between `A` and `B` and are repelled when `X` lies between `B` and `C`
B. Attracted when `x` lies between `B` and `C` and are repelled when `X` lies between `A` and `B`
C. Attracted when they reach `B`
D. Repelled when they reach `B`

Answer 1

Correct Answer - B
`F=-((dU)/(dx))`
In the region `BC` slope of the graph is positive `because``F=`negative i.e, force is attractive in nature in the region `AB` slope of the graph is negative `F=`positive i.e, force is repulsive in nature