- Home
- Standard 12
- Physics
Two particles $X $ and $Y$, of equal mass and with unequal positive charges, are free to move and are initially far away from each other. With $Y$ at rest, $X$ begins to move towards it with initial velocity $u$. After a long time, finally
$X$ will stop, $Y$ will move with velocity $u$.
$X$ and $Y$ will both move with velocities $u/2 $ each.
$X $ will stop, $Y$ will move with velocity $< u.$
both will move with velocities $< u/2.$
Solution
Initially both charges are far apart so there is no electrostatics force but when $X$ starts moving then Electrostatics force $F=\frac{k q_{1} q_{2}}{r^{2}}$
Given that both masses have positive charges, so they will repel each other.
Force on the $X$ will be opposite to direction of displacement so it will stop after some time. And $Y$ starts moving as force is acting on it
