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Unformatted text preview: - 1 - Name _______________________ Student Number _______________________ Section _______________________ Instructor Name _______________________ PHYSICS 1B03 DAY CLASS DURATION OF EXAMINATION: 2 Hours THIS EXAMINATION PAPER INCLUDES 14 PAGES AND 30 QUESTIONS. PAGES 12 AND 13 ARE INTENTIONALLY LEFT BLANK , PAGE 14 IS THE FORMULA SHEET . YOU ARE RESPONSIBLE FOR ENSURING THAT YOUR COPY OF THE PAPER IS COMPLETE. BRING ANY DISCREPANCY TO THE ATTENTION OF YOUR INVIGILATOR. Special instructions: • Write your name, student number and section at the top of this page. Be prepared to present your McMaster Student ID card for verification. • Circle only ONE answer for each question. Multiple answers will be marked as wrong. Each question is worth one mark. • Note that a formula sheet is provided at the end of the exam. It is up to the student to know when the appropriate formula can be used. • Use of Casio FX-991 series calculator only is allowed. • Portable communications devices of all types (e.g. pagers, cellular phones, communicating calculators) are prohibited in the examination room. All such devices must be turned off prior to the start of the examination. • Giving or receiving aid during an examination is a violation of university rules and may result in a failing grade and/or expulsion from the university. Do not write below this line. TOTAL CONTINUED ON PAGE 2 - 2 - 1) A locomotive pulls a series of wagons. Which is the correct analysis of the situation? a) The train moves forward because the locomotive pulls forward slightly harder on the wagons than the wagons pull backward on the locomotive. b) Because action always equals reaction, the locomotive cannot pull the wagons--the wagons pull backward just as hard as the locomotive pulls forward, so there is no motion. c) The locomotive gets the wagons to move by giving them a tug during which the force on the wagons is momentarily greater than the force exerted by the wagons on the locomotive. d) The locomotive can pull the wagons forward only if it weighs more than the wagons. e) The locomotive's force on the wagons is as strong as the force of the wagons on the locomotive, but the frictional force on the locomotive is forward and large while the backward frictional force on the wagons is small. 2) A 3.0 kg wood crate sits in the back of a truck. The coefficients of friction between the crate and the truck are µ s = 0.9 and µ k = 0.5. What is the maximum acceleration the truck can have without the crate slipping out the back? a) 4.9 m/s 2 b) 8.8 m/s 2 c) 15 m/s 2 d) 27 m/s 2 e) cannot be determined from the information given 3) A ball is thrown from the ground toward a cliff of height h with a speed of 30 m/s and an angle of 60 o above horizontal. It lands on the cliff 4.0 s later at a distance of 5.0 m from the edge. How high is the cliff?...
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