Question

I'm adding my vectors incorrectly. Please give me a min to draw it.

Answer 1

\[\vec{F}_{net}=(\vec F_{41}-\vec F_{31}\cos(45))\hat i +(\vec F_{21}-\vec F_{31}\sin(45)) \hat j\]

Answer 2

\[F_{net}=\left( \frac{kq_4q_1}{r_{41}^2}-\frac{kq_3q_1}{r_{31}^2}\sin(45)\right) \hat i \left(\frac{kq_2q_1}{r_{21}^2}-\frac{kq_3q_1}{r_{31}^2}\cos(45)\right) \hat j\]

Answer 3

\[q_1=3\times10^{-9}\]
\[q_2=9\times10^{-9}\]
\[q_3=-9\times10^{-9}\]
\[q_4=9\times10^{-9}\]

Answer 4

@phi

Answer 5

I get \[(72974.5 N)\hat i\]

Answer 6

which is wrong...

Answer 7

.000392 should be the answer