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AP® Physics C: E & M

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Magnitude and direction of electrostatic force

APPHEM-3RBYUK

A charge $\mathit{q}$ of mass $\mathit{m}$ that is free to move is placed at the origin of a coordinate system.

A second identical charge, but of twice the mass, is placed at a distance $d$ along the positive $x$ axis from the origin.

Which of the following correctly describes the magnitude and direction of the force acting on the particle at the origin?

A

$\mathit{\cfrac{2kq}{d^2}}$, to the left

B

$\mathit{\cfrac{2kq^2}{d^2}}$, to the right

C

$\mathit{\cfrac{2kq^2}{d^2}}$, to the left

D

$\mathit{\cfrac{kq^2}{d^2}}$, to the right

E

$\mathit{\cfrac{kq^2}{d^2}}$, to the left