Tough physics problem?*10 points for the first correct answer*?

Question

pLs someone help me solve these.i already answered #1 and 2...bUt i dont know how to soLve the rest.

q1=4 X 10^-6 C

q2=-3 X 10^-6 C

q3=-2.12 X 10^-6 C

q4=-2.12 X 10^-6 C

*10 cm apart from each other

angle=135

1. what is the magnitude of force exerted on charge q1 by charge q2?

ans: 10.8 N

2. what is the magnitude of force exerted on charge q1 by charge q3?

ans: 7.63 N

3. refer to question 2. what is the horizontal component of force exerted on q1 by q3?

a. 0 N

b. 0.108 N

c. 3.77 N

d. 5.39 N

e. 7.63 N

f. 10.8 N

4. what is the resultant force exerted on charge q1 by the other three charges?

5. if q1 were replaced by a charge of -4 X 10^-6 C, what would be the resultant force exerted on it by the other three charges?

(choose your answers from the choices given in question 3)

thanks sOo much! 10 points fOr best answer!;)

Answer 1

You have not specified exactly how the charges are arranged, for example, are the second, third and fourth charges all 10cm from the first? Or do the charges lie on the four corners of a square (if so, which corner corresponds to which charge?)

From your description, it sounds like the first charge is at the centre of a circle, with the other charges on the circumference. Charge 2 at 3 o' clock, charge 4 at 6 o' clock and charge 3 at the midpoint between 4 and 5 o' clock.

If you can give a more accurate description, or better yet, a diagram, I will edit my answer and help you through the question.

Answer 2

If you dont know then I dont know.