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Practice_Final_Difficult

# Practice_Final_Difficult - |_|_|_| First Three Letters of...

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|___|___|___| , DL Section: First Three Letters of Last Names Last Name First Name Office Use Physics 7B March 17 th , 2010 Final Examination Instructions: Put your full name on every page of this exam. Remember to pace yourself. You have roughly 20 minutes per problem. The last page of this exam is a formula sheet for your reference. Sign this page in the space provided below. Do Not Cheat! Cheating will not be tolerated. Suspected cheating of any form is always immediately reported to Student Judicial Affairs for appropriate action. I certify by my signature below that I will abide by UC Davis Code of Academic Conduct. Signature: Name: , DL Section: Last First

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|___|___|___| , DL Section: First Three Letters of Last Names Last Name First Name Office Use 1. A pendulum has a massless string of length r with a ball of mass m attached to the end. The bob is pulled to an angle θ 0 from the vertical and released from rest. It then it swings in a vertical plane. Assume there is no air resistance. a. Draw a force diagram indicating all the forces on the pendulum bob at a point in its swing when the angular displace has a value of . Label the forces clearly, and give them relative magnitudes that are reasonable. b. Derive an algebraic expression in terms of r , m , g , and θ for the tension T as a function of . c. Determine the kinetic energy of the pendulum as a function of . d. Write down an expression that describes the displacement of the pendulum as a function of time.
|___|___|___| , DL Section: First Three Letters of Last Names Last Name First Name

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