This preview shows pages 1–3. 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: kim (jkk547) HW03 markert (58840) 1 This printout should have 21 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 2) 10.0 points A superhero flies 258 m from the top of a tall building at an angle of 25 below the horizontal. Draw the vectors to scale on a graph to determine the answer. a) What is the horizontal component of the superheros displacement? Correct answer: 233 . 827 m. Explanation: 233 . 827 m 109 . 036m 258 m Scale: 100 m 2 5 Basic Concept: x = d (cos ) Given: d = 258 m = 25 Solution: x = (258 m)[cos( 25 )] = 233 . 827 m . 002 (part 2 of 2) 10.0 points b) What is the vertical component of the su perheros displacement? Correct answer: 109 . 036 m. Explanation: Basic Concept: y = d (sin ) Solution: y = (258 m)[sin( 25 )] = 109 . 036 m . 003 10.0 points Consider the vectors vector A and vector B . vector A vector B Which sketch shows the vector vector A vector B to the same scale? 1. 2. correct 3. 4. 5. 6. 7. kim (jkk547) HW03 markert (58840) 2 8. Explanation: vector A vector B vector A vector B 004 10.0 points A car travels 2 . 33 km in the xdirection, then turns left 80 . 3 to the original direction and travels an additional distance of 2 . 52 km. Calculate the x component of the cars net displacement. Correct answer: 2 . 75459 km. Explanation: The x component of the cars net displace ment is simply (2 . 33 km)(cos 0 )+(2 . 52 km)(cos 80 . 3 ) = 2 . 75459 km . 005 (part 1 of 2) 10.0 points A skier squats low and races down a(n) 17 ski slope. During a 7 s interval, the skier accelerates at 3 . 3 m / s 2 . a) What is the horizontal component of the skiers acceleration (perpendicular to the direction of free fall)? Correct answer: 3 . 15581 m / s 2 . Explanation: a y a x 3 . 3 m / s 2 17 Note: Figure is not drawn to scale. Basic Concept: a x = a (cos ) Given: = 17 a = 3 . 3 m / s 2 Solution: a x = (3 . 3 m / s 2 )[cos( 17 )] = 3 . 15581 m / s 2 006 (part 2 of 2) 10.0 points b) What is the vertical component of the skiers acceleration? Correct answer: . 964827 m / s 2 . Explanation: Basic Concept: a y = a (sin ) Solution: a y = (3 . 3 m / s 2 )[sin( 17 )] = . 964827 m / s 2 007 (part 1 of 2) 10.0 points A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 37 . 2 m / s. At the same time, it has a horizontal velocity of 55...
View
Full
Document
 Fall '09
 MARKERT
 Physics

Click to edit the document details