A block of mass 0.40kg is attached to a horizontal spring of force constant 160Nm−1 and allowed to oscillate on a frictionless surface. At t=0 the block is released from rest at its maximum extension of 0.08m.
a) Calculate the time period of the oscillation.
b) Determine the time taken for the block to reach the displacement +0.04m from equilibrium for the first time.
c) At what later time, within the first complete oscillation, will the block again be at +0.04m while moving in the opposite direction?