A spring (k = 200 N/m) is suspended with its upper end supported from a ceiling. With the spring hanging in its equilibrium configuration, an object (mass = 2.0 kg) is attached to the lower end and released from rest. What is the speed of the object after it has fallen 4.0 cm?
1) 90 cm/s
2) 79 cm/s
3) 96 cm/s
4) 83 cm/s
5) 57 cm/s
Answer: 2