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Unformatted text preview: Version One Homework 2 savrasov 39822 Oct 08, 2007 1 This printout should have 8 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. The due time is Central time. Serway CP 03 14 04:01, trigonometry, numeric, > 1 min, nor mal. 001 (part 1 of 1) 2 points A quarterback takes the ball from the line of scrimmage, runs backward for 10 yards, then runs sideways parallel to the line of scrim mage for 15 yards. At this point, he throws a 50 yards forward pass straight downfield perpendicular to the line of scrimmage. What is the magnitude of the footballs resultant displacement? Correct answer: 42 . 72 yards. Explanation: Let the x direction be parallel to line of scrimmage. Given : y 1 = 10 yards , x = 15 yards , and y 2 = 50 yards . y tot = y 1 + y 2 = 10 yards + 50 yards = 40 yards x tot = x = 15 yards The displacements are perpendicular, so d = q ( x tot ) 2 + ( y tot ) 2 = q ( 15 yards) 2 + (40 yards) 2 = 42 . 72 yards . keywords: Angled Projectile 02 04:06, trigonometry, numeric, > 1 min, wordingvariable....
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