1. A 7.73 nC charge is located 1.87 m from a 3.86 nC point charge. Find the magn

Question

1. A 7.73 nC charge is located 1.87 m from a 3.86 nC point charge. Find the magnitude of the electrostatic force in one charge exertson the other. Is the force attractive or repulsive?

2. A small sphere of mass m= 7.60 g and a charge q1 = 29.9 nC is attracted to the end of a string and hangs vertically as in the figure. A second charge of equal mass and charge q2 = -58.0 nC is located below the first charge a distance d = 2.00 cm below the first charge. Find the tension in the string. If the string can withstand a maximum tension of 0.180 N, what is the smallest value d can have before the string breaks?

Explanation / Answer

F=Q1*Q2 / (4 * pi * Eo * r^2)

Q1=6.5 * 10^-9 (6.5nm)

Q2=2.7 * 10^-9(2.7nm)

pi=3.14

r=2.7m

Eo = 8.854 x 10^-12

therefore F =( 6.5 * 4.1 * 10^-18 ) / ( 4* 3.14 * 8.85

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