Practice midterm3 - Physics 140 Midterm 3 Name Section number Student ID Form 1 Choose the best answer Useful information Volume of sphere 4/3R3

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Physics 140 Midterm 3 November 20, 2000 Name ___________________ Section number______________ Student ID_____________________ Form 1 Choose the best answer Useful information: Volume of sphere: 4/3 π R 3 Moments of Inertia for uniform objects: Sphere, through any diameter 2/5 MR 2 Disk, through the axis 1/2 MR 2 Cylinder, through the axis 1/2 M((R1) 2 + (R2) 2 ) Plate, axis perpendicular to face and through center 1/12 M(a 2 + b 2 ) Rod, axis perpendicular to length and through center 1/12 ML 2 Acceleration due to Gravity near surface of earth: g 9.8 m/s 2 Universal Gravitational constant: G 6.67 X 10 –11 N m 2 /kg 2
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1. Three homogeneous rigid bodies – a solid sphere, a solid cylinder, and a hollow cylinder – are placed at the bottom of an incline (figure below). If they all are given the same initial velocity V up the incline and they roll up and then back down to the starting position. Which object reaches the bottom first? A. The sphere. B. The solid cylinder. C. The hollow cylinder. D. They all reach the bottom at the same time. E. Cannot determine without the masses and radii. 2. Many people today are worried about global warming. One of the effects of such a warmer climate would be to melt the polar icecaps. If this were to happen would there be any change to the earth’s period of rotation, 1 day? A. The period would decrease.
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This note was uploaded on 04/01/2008 for the course PHYSICS 140 taught by Professor Evrard during the Spring '07 term at University of Michigan.

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Practice midterm3 - Physics 140 Midterm 3 Name Section number Student ID Form 1 Choose the best answer Useful information Volume of sphere 4/3R3

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