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final-practice_wi11 grinstein

final-practice_wi11 grinstein - Physics 2A Sec B00...

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Physics 2A, Sec B00: Mechanics -- Winter 2011 Instructor: B. Grinstein Final Exam INSTRUCTIONS: Use a pencil #2 to fill 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 form (see letter A -- D at bottom of page) in your scantron under "TEST FORM;" an error entering the "test form" will result in automatic 20% deductions, and may lead to disqualification. Write your name and 3 - digit ID at the bottom of this page and turn it in with your scantron when you are finished working on the exam. Moment of inertia about axis through center of mass: thin rod of mass M and length L I = 1/12 ML 2 solid cylinder of mass M and radius R, axis of rotation along axis of cylinder, I = 1/2 MR 2 solid sphere of mass M and radius R, I = 2/5 MR 2 hollow sphere of mass M and radius R, I = 2/3 MR 2 1) You throw a ball straight up in the air. The acceleration of the ball A) is largest just before it hits the ground, and zero when it reaches the maximum height B) is largest just after it leaves your hand, and zero when it reaches the maximum height C) is larger just before it hits the ground than just after it leaves your hand D) is the same just before it hits the ground as when it reaches maximum height E) none of the above 2) A graph of position as a function of time is shown below (The axis are not labeled, the vertical axis is for displacement and the horizontal is for time. Each square is a unit of 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
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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
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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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