Physics

Problem

Three point charges are kept on a straight line along the x–axis as shown below: •

q_1 = +4\,\mu\text{C}

x=0\,\text{m}

•

q_2 = -2\,\mu\text{C}

x=0.50\,\text{m}

•

q_3 = +3\,\mu\text{C}

x=1.20\,\text{m}

Take

k = 9.0 \times 10^{9}\,\text{N m}^2\text{C}^{-2}

. a. (a) Calculate the magnitude and direction of the force exerted on

q_1

q_2

. b. (b) Calculate the magnitude and direction of the force exerted on

q_1

q_3

. c. (c) Hence determine the magnitude and direction of the net electrostatic force acting on

q_1

. Express the final answer clearly with appropriate units.