Physics

Problem

Three point charges are fixed at the corners of an equilateral triangle of side

0.20\,\text{m}

. Charges

+4.0\,\mu\text{C}

are at two of the corners, and a charge

-2.0\,\mu\text{C}

is at the third corner. What is the magnitude of the net electric force on the

-2.0\,\mu\text{C}

charge? a)

1.8\,\text{N}

4.2\,\text{N}

3.1\,\text{N}

3.6\,\text{N}