This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: hamdeh (ah37785) HW 2 opyrchal (111213) 1 This printout should have 11 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 2) 10.0 points Consider the positiontime graph for a squir rel running along a clothesline. b b b b b b 1 2 3 4 5 1 2 3 4 1 2 time (s) position(m) What is the squirrels displacement at the time t = 1 . 0 s? Your answer must be within 5.0% Correct answer: 3 m. Explanation: Let : x f = 3 m and x i = 0 m . The displacement is x = x f x i = (3 m) (0 m) = 3 m . 002 (part 2 of 2) 10.0 points What is the squirrels average velocity during the time interval between 0.0 s and 1.0 s? Your answer must be within 5.0% Correct answer: 3 m / s. Explanation: Let : t = 1 . 0 s . v avg = x t = 3 m 1 s = 3 m / s . 003 10.0 points A car travels along a straight stretch of road. It proceeds for 11 . 3 mi at 51 mi / h, then 25 . 1 mi at 48 mi / h, and finally 34 . 4 mi at 36 . 1 mi / h. What is the cars average velocity during the entire trip? Correct answer: 41 . 711 mi / h. Explanation: Let : d A = 11 . 3 mi , v A = 51 mi / h , d B = 25 . 1 mi , v B = 48 mi / h , d C = 34 . 4 mi , and v C = 36 . 1 mi / h . The total time the car spent on the road is t = d A v A + d B v B + d C v C = 11 . 3 mi 51 mi / h + 25 . 1 mi 48 mi / h + 34 . 4 mi 36 . 1 mi / h = 1 . 69739 h , so the average velocity is v = d t = d A + d B + d C t = 11 . 3 mi + 25...
View
Full
Document
 Spring '12
 James
 Physics

Click to edit the document details