Question

The potential energy of a system is represented as shown in the figure. The force acting on the system will be represented by

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

As slope of U - x graph is positive and constant upto distance a then it becomes zero. Therefore from $F=-\frac{dU}{dx}$ we can say that upto distance a force will be constant (negative) and suddenly it becomes zero.