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Unformatted text preview: Phys 111 Fall 2007 General Physics I: Class Exam I 5 October 2007 Name: Total: /50 Instructions • There are 7 questions on 7 pages. • Show your reasoning and calculations and always justify your answers. Physical constants and useful formulae g = 9 . 81m/s This page is intentionally blank. 2 Question 1 Three balls of varying masses are releases from rest at varying heights above the ground as illustrated. Let t A be the time taken for A to reach the ground, t B be the time taken for B to reach the ground, etc.. .. . Ignoring air resistance, which of the following best describes the relationship between these times? a) t A = t B = t C b) t A = t B > t C c) t A > t B = t C d) t A > t B > t C 1 2 3 4 5 6 y A (2kg) B (4kg) C (2kg) /4 Question 2 A baseball of mass 0 . 145kg is struck with speed 30m/s at an angle of 70 ◦ from the horizontal. Ignoring air resistance, determine the maximum height that the baseball reaches....
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 Spring '11
 Phystago
 Math, Force, Friction, Mass, kg, asteroid moves

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