# HW1a - Version One Homework 1 savrasov 39822 This print-out...

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Version One – Homework 1 – savrasov – 39822 – Sep 28, 2007 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. The due time is Central time. Jet in Flight 02:02, trigonometry, numeric, > 1 min, nor- mal. 001 (part 1 oF 3) 1 points A jet travels at 400 m / s. How long does it take to travel 200 m? Correct answer: 0 . 5 s. Explanation: s = vt , so t = s v . Dimensional analysis For t 1 : m ÷ m s = m · s m = s so the units are compatible. 002 (part 2 oF 3) 1 points How long to travel 5 km? Correct answer: 12 . 5 s. Explanation: Dimensional analysis For t 2 : km ÷ m s = km · s m · 1000 m 1 km = 1000 s 003 (part 3 oF 3) 1 points How long to travel 5 in . ? Correct answer: 0 . 0003175 s. Explanation: Dimensional analysis For t 3 : in ÷ m s = in · s m · 2 . 54 cm 1 in · 1 m 100 cm = s keywords: Average Velocity on a Trip 02:03, trigonometry, numeric, > 1 min, nor- mal. 004 (part 1 oF 1) 1 points A car travels along a straight stretch oF road. It proceeds For 14 . 5 mi at 55 mi / h, then 22 . 5 mi at 45 mi / h, and fnally 30 . 5 mi at 35 mi / h. What is the car’s average velocity during

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## This note was uploaded on 01/10/2010 for the course PHY na taught by Professor Richardscalettar during the Fall '09 term at UC Davis.

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HW1a - Version One Homework 1 savrasov 39822 This print-out...

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