Two positively charged particles $X$ and $Y$ are initially far away from each other and at rest. $X$ begins to move towards $Y$ with some initial velocity. The total momentum and energy of the system are $p$ and $E$.
Two positively charged particles $X$ and $Y$ are initially far away from each other and at rest. $X$ begins to move towards $Y$ with some initial velocity. The total momentum and energy of the system are $p$ and $E$.
- A
If $Y$ is fixed, both $p$ and $E$ are conserved.
- B
If $Y$ is fixed, $E$ is conserved, but not $p$.
- C
If both are free to move, $p$ is conserved but not $E$.
- D
If both are free, $E$ is conserved, but not $p$.
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