10. Identical +9.30 Identical +9.30 mu C charges are fixed to adjacent corners o

Question

10. Identical +9.30

Identical +9.30 mu C charges are fixed to adjacent corners of a square. What charge (magnitude and algebraic sign) should be fixed to one of the empty corners, so that the total electric potential at the remaining empty corner is 0 V? A charge of -3.15 mu C is fixed in place. From a horizontal distance of 0.0475 m, a particle of mass 7.30 times 10-3 kg and charge -7.50 mu C is fired with an initial speed of 62.5 m/s directly toward the fixed charge. How far does the particle travel before its speed is zero?

Explanation / Answer

a)Electric potential = kQ/a ( a = side length of square)

The electric potential at the empty corner =
U = 0 = k(x/a + 9.3/(a*?2) + 9.3/a)
x/a +9.3/(a*?2) + 9.3/a = 0
x + 9.3/?2 + 9.3 = 0
x = (- 9.3 )

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