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Unformatted text preview: DO NOT OPEN YOUR EXAM UNTIL TOLD Exam I, Phys 172, Spring 2009 EXAM # 04 1. Record your two-digit exam version number on scantron form in the field Test/Quiz number. Please do not omit leading zero. 2. Write your name in the top-right corner here and on the scantron form 3. Record your PUID number in the respective field on your scantron form Do not use other paper. Write on the back of this test if needed . The page with major equations is provided with this exam (in the back) Circle your answers here and on scantron form. At the end of the exam, you will return scantron form and this printout with circled answers to your TA. LAST NAME: . First name and initial: Problems 1-4: For the next four problems consider vectors in the diagram shown below, in which each division is equal to 1 m. Problem 1 What are the components of the vector a & ? A) <8, 6> m B) <-4, -2> m C) <4, 4> m D) <6, 8> m E) <-2, -4> m Problem 2 What is the magnitude of the vector a & ? A) 14 m B) 10.3 m C) 9.7 m D) 10 m E) 5.65 m Problem 3 What is the unit vector in the direction of the vector a & ? A) <0.6, 0.8> B) <0.8, 0.6> C) <1, 1> D) <0.75,1> E) <0.71, 0.71> Problem 4 Which one if the following statements is true about vectors a & , b & and c & ? A) = + + c b a & & & B) =- + b c a & & & C) c b a & & & = + D) b c a & & & + = E) c b a & & & =- Problem 5 There are about 3.2 billion people in China. If they all simultaneously jump up, estimate There are about 3....
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- Spring '08