2. (5.1.1 #6) A 10 kg mass stretches a spring 70 cm in equilibrium. Suppose a 2 kg mass is attached to the spring, initially displaced 25 cm below equilibrium, and given an upward velocity of 2 m/s. Find its displacement for t > 0. Find the frequency, period, amplitude, and phase angle of the motion.

2. (5.1.1 #6) A 10 kg mass stretches a spring 70 cm in equilibrium. Suppose a 2 kg mass is attached to the spring, initially displaced 25 cm below equilibrium, and given an upward velocity of 2 m/s. Find its displacement for t > 0. Find the frequency, period, amplitude, and phase angle of the motion.