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Unformatted text preview: Physics 2A, Sec B00: Mechanics Winter 2011 Instructor: B. Grinstein Final Exam INSTRUCTIONS: Use a pencil #2 to fll your scantron. Write your code number and bubble it in under "EXAM NUMBER;" an entry in error will result in an automatic 10% deduction. Bubble in the quiz orm (see letter A D at bottom o page) in your scantron under "TEST FORM;" an error entering the "test orm" will result in automatic 20% deductions, and may lead to disqualifcation. Write your name and 3 digit ID at the bottom o this page and turn it in with your scantron when you are fnished working on the exam. Moment o inertia about axis through center o mass: thin rod o mass M and length L I = 1/12 ML 2 solid cylinder o mass M and radius R, axis o rotation along axis o cylinder, I = 1/2 MR 2 solid sphere o mass M and radius R, I = 2/5 MR 2 hollow sphere o mass M and radius R, I = 2/3 MR 2 1) You throw a ball straight up in the air. The acceleration o the ball A) is largest just beore it hits the ground, and zero when it reaches the maximum height B) is largest just ater it leaves your hand, and zero when it reaches the maximum height C) is larger just beore it hits the ground than just ater it leaves your hand D) is the same just beore it hits the ground as when it reaches maximum height E) none o the above 2) A graph o position as a unction o time is shown below (The axis are not labeled, the vertical axis is or displacement and the horizontal is or time. Each square is a unit o meters in the vertical and seconds in the horizontal). During which time interval could the object be possibly moving with non zero constant acceleration? Name________________________________________ Student 3 digit ID________ version page: 1 A) 6.1 s to 7.9 s B) 4.1 s to 5.9 s C) 0.1 s to 1.9 s D) 2.1 s to 3.9 s E) There is no interval that is consistent with constant non zero acceleration. 3) Under what condition is A + B = A + B ? A) The statement is always true. B) The statement is never true. C) Vectors A and B are in opposite directions. D) Vectors A and B are in perpendicular directions. E) Vectors A and B are in the same direction. version page: A) 6.1 s to 7.9 s B) 4.1 s to 5.9 s C) 0.1 s to 1.9 s D) 2.1 s to 3.9 s E) There is no interval that is consistent with constant non zero acceleration. 3) Under what condition is A + B = A + B ? A) The statement is always true. B) The statement is never true. C) Vectors A and B are in opposite directions. D) Vectors A and B are in perpendicular directions. E) Vectors A and B are in the same direction. version page: 2 4) The velocity of object A and object B relative to the ground are perpendicular to each other. Which statement is true regarding the magnitude of the relative velocity of object A to object B?...
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This note was uploaded on 12/08/2011 for the course PHYS 2A 2 taught by Professor Sharma during the Spring '09 term at UCSD.
 Spring '09
 SHARMA

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