San Jose state University Department of Mechanical Engineering Course ME 130 Applied Engineering Bonus Quiz No. 7 On the Design and test a demonstration unit for Resonant and Near-resonant vibration of a simple-Mass system This is the last bonus quiz for the semester Fall 2017, accounts for double credits No more than 3 students allowed in the team Instructor: Tai-Ran Hsu, Professor Assigned on October 31 Due date for submission on December 5, 2017

Objective: Design and construct an experimental set-up for class demonstrations of resonant and near-resonant vibration of a solid mass supported by an elastic spring, such as Illustrated in the Figure 1. Natural circular frequency of Mass, Spring K   MASS m Solenoid for cyclic force Applied cyclic force frequency, ω (provided by the attached solenoid) Demonstration Case 1 for resonant vibration: Make ω = ωo Demonstrate Case 2 for near-resonant vibration: Make ω ≈ ωo Visibility of mass vibrations in either cases will be a priority for grading. NOTE: Visual effects on mass vibrations in both demonstrations will be a priority for grading. (2) Adequacy of demonstrate setting and its robust will be desired. (3) Comparison of measured amplitudes of mass vibrations with the computed values will OFFER extra credit (the 3rd credit) to the project.