Answer Happy

15. What is the period of vibration for a 50 gram mass hanging from a spring with a spring constant of 14 N/m? 16. What is the natural frequency of vibration of a 25 cm long pendulum? 17. If the 25 cm long pendulum in the previous problem were transported to the moon's surface where lunar gravity is one-sixth that of earth's gravity, what would be its new period of vibration? 18. Imagine that you make a pendulum by throwing a rope over a high branch of a tree and tying a care tire to one end while you hold onto the other end of the rope. While the tire is swinging back and forth at whatever its natural frequency is, what will happen to that natural frequency of vibration if you feed it some more rope so that the tire swing gets longer? [Just select one option – increases, decreases, or stays the same). Although you don't have to explain why, I would encourage you to do so in the space below.