PHYS 260 Final: PHYS260 Final Exam 2009 Fall
Document Summary
Problem 4 (20 pts) (5 points each subpart) a string is fixed at one end to a wall and the other end is attached to a hanging block (see picture). The horizontal segment of the string is l = 1. 5 m long and has a mass m = 0. 15 kg. The block and the hanging part of the string together have a mass m = 1. 0 kg. A student plucks the center of the horizontal segment of the string, creating a standing wave. (assume g = 10 m/s2) (a) sketch the fundamental mode of the standing wave. The fundamental mode looks like this: (b) find (i) the fundamental wavelength and (ii) the fundamental frequency. (i)the fundamental frequency can be found just by looking at the picture of the mode. From the picture, the length l=1. 5 m forms one-half of a wavelength.
