One end of a light spring with force constant k = 125 N/m is attached to a wall, and the other end to a metal block with charge q_A = 2.04 C on a horizontal, frictionless table as shown in the figure. A second block with charge q_B = ?3.54 C

is brought close to the first block. The spring stretches as the blocks attract each other so that at equilibrium, the blocks are separated by a distance d = 11.8 cm. What is the displacement x of the spring?

m

- 9A + qA 6008008080 080808 + d