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Unformatted text preview: Scott Pratt PHY231, Spring 2007  Introduct 1 Midterm 1 (lecture students) Scott Pratt Do not open exam until instructed to do so. Scott Pratt PHY231, Spring 2007  Introduct 3 Midterm 1 (lecture students) 2 pt Consider A=18 kg and B=2 s 2 . Please identify if the operations below are possible or not, and if they are, whether or not the answer given is correct. . You can divide A by B (A/B), and get 9 kg/s 2 . 1 . A This is impossible B This is possible, but the answer is false C This is correct . You can subtract B from A (AB), and get 16 kg. 2 . A This is impossible B This is possible, but the answer is false C This is correct 4 pt A rock is hurled upward from a high bridge with an initial upward speed of 30 m/s. Eventually, the rock lands in the river, 50 m below the initial release point. For the following statements, displacements are measured relative to the release point and the upward direction is positive. . During the entire flight, the displacement of the rock is positive or zero. 3 . A True B False . At its highest point, the rock has zero velocity. 4 . A True B False . The maximum speed occurs on the way down at the instant when the rock passes the initial release point. 5 . A True B False . At its highest point, the rock has zero acceleration. 6 . A True B False 4 pt Three identical airplanes with identical air speeds leave Kansas City. Airplane A leaves on Monday, a calm and wind less day, and flies directly eastward to St. Louis. Airplanes B and C leave on Tuesday, when there is a strong north wind. Airplane B points the plane directly eastward and is blown off course, passing south of St. Louis, while Airplane C adjusts its direction to account for the wind and flies directly east to St. Louis. . The plane(s) with the largest eastward component to its velocity is . 7 . A Airplane A B Airplane B C Airplane C D Airplanes A, B and C E Airplanes A and C F Airplanes A and B G Airplanes B and C . The plane(s) that reaches St. Louis in the least amount of time is ....
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This note was uploaded on 04/10/2008 for the course PHY 231 taught by Professor Smith during the Spring '08 term at Michigan State University.
 Spring '08
 smith

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