1. The problem statement, all variables and given/known data A block having mass m and charge +Q is connected to an insulating spring having force constant k. The block lies on a frictionless, insulating horizontal track, and the system is immersed in a uniform electric field of magnitude E The block is released from rest at a moment when the spring is unstretched (that is, when x = 0). (a) By what maximum amount does the spring expand? (b) What is the equilibrium position of the block? (c) Show that the blocks motion is simple harmonic and determine its period. (d) What if? Repeat part a, assuming now that there is friction between the block and track. Take mew sub k as the relevant coe¢ cient of kinetic friction. 2. Relevant equations 3. The attempt at a solution Not sure how to tackle this problem.