Practice Exam 1.2

# Practice Exam 1.2 - ME 240 Dynamics Vibrations Exam#1 11:40...

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ME 240 Dynamics & Vibrations Exam #1 February 11, 2008 11:40 AM – 1:00 PM Instructor: Prof. Kathleen Sienko (Sec. 002) Exam Rules: Closed book Calculator allowed One single-sided 8x11 inch formula sheet allowed No worked problems No laptops or cell phones Final answers must be written in the designated area on each page. No work will be accepted after 1 PM. Problem 1 20 Points Problem 2 20 Points Problem 3 60 Points Name ____________________________________________ I have neither given nor received aid on this examination, nor have I concealed any violation of the Honor Code. Signature ____________________________________________

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Name 2 Problem 1. (20 points) a. A small object A of mass m is held against the vertical side of the rotating cylindrical container of radius r by centrifugal action. If the coefficient of static friction is μ s , determine the expression for the minimum rotational rate d θ dt = ω of the container that will keep the object from slipping down the vertical side. Answer: Expression for ω
Name 3 Problem 1. Workspace continued

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Name 4 Problem 2. (20 points)
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