Question

1) A 7.24 -nC charge is located 1.62 m from a 4.10-nC charge. Find the magnitude of the electrostatic force that one charge exerts on the other.

2) A small sphere of mass m = 6.80 g and charge q₁ = 28.1 nC is attached to the end of a string and hangs vertically. 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.

(a) Find the tension in the string.

(b)If the string can withstand a maximum tension of 0.180 N, what is the smallest value d can have before the string breaks?

Answer 1