Question

The curves for potential energy $(U)$ and kinetic energy $\left(E_{ k }\right)$ of a two particle system are shown in figure. At what points the system will be bound?

• A. Only at point D
• B. Only at point A
• C. At point D and A
• D. At points A, B and C

Answer 1

Answer: (D)

The system will be bound at points where total energy is negative. In the given curve at point $A, B$ and $C$, the $PE$ is more than $KE$