A massless spring is attached to a support at one end and
Chapter 22, Problem 22.61(choose chapter or problem)
A massless spring is attached to a support at one end and has a 2.0 mC charge glued to the other end. A -4.0 mC charge is slowly brought near. The spring has stretched 1.2 cm when the charges are 2.6 cm apart. What is the spring constant of the spring?
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