(Released from rest away from equilibrium)
(i) A 0.40kg mass is connected to an ideal spring of force constant 10Nm−1. The mass is pulled 0.080m to the right, held, and released from rest at t=0. Determine the amplitude and the phase constant of the subsequent motion.
(ii) Calculate the time taken by the mass to reach the mean position for the first time after release.
(iii) Find the instantaneous potential energy stored in the spring at the instant obtained in part (ii).