Question

Find the net force on –2q -

• A. $\frac{\sqrt{3}kq^{2}}{a^{2}}$
• B. $\frac{2\sqrt{3}kq^{2}}{a^{2}}$
• C. Zero
• D. None

Answer 1

Answer: (B)

$\frac{2\sqrt{3}kq^{2}}{a^{2}}$

Answer 2

F_R = 2F cos q/2 = 2 F cos 60/2 =$\sqrt { 3 }$F

F_R = $\frac { \sqrt { 3 } \times 2 \mathrm { kq } ^ { 2 } } { \mathrm { a } ^ { 2 } }$