hw3 - sousse (res2468) HW 3 Kleinman (58225) 1 This...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: sousse (res2468) HW 3 Kleinman (58225) 1 This print-out should have 29 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. This HW covers Chs. 3 and 4. 001 10.0 points Find the magnitude of the displacement of a point on a wheel initially in contact with the ground when the wheel, of radius 68 . 5 cm, rolls forward half a revolution. Correct answer: 255 . 107 cm. Explanation: Basic Concepts: Magnitude of Vector The point of contact has moved forward half a revolution, so the horizontal displacement is half the circumference x = R The point initially in contact with the ground is now at the top of the wheel, so its vertical displacement is y = 2 R Thus, the magnitude of the displacement is s = radicalbig x 2 + y 2 002 (part 1 of 2) 10.0 points A B C D P R The vector vector R shown in the sketch may be expressed in terms of vector A , vector B , vector C , and vector D , which are the edges of a parallelogram, as 1. vector R = vector C + vector D . 2. vector R = vector D vector A. 3. vector R = vector A + vector D . 4. vector R = vector C + vector B . 5. vector R = vector A vector C . 6. vector R = vector B + vector D . 7. vector R = vector B vector A. 8. vector R = vector A vector D . 9. vector R = vector A vector B . 10. vector R = vector B + vector A. correct Explanation: The solution is found by the application of the parallelogram rule of addition; the tails of the two vectors vector A and vector B are joined together and the resultant vector is the diagonal of a parallelogram formed with vector A and vector B as two of its sides. 003 (part 2 of 2) 10.0 points The vector vector P shown in the sketch may be expressed in terms of vector A , vector B , vector C , and vector D as 1. vector P = vector C + vector B . 2. vector P = vector B vector A. 3. vector P = vector A vector D . 4. vector P = vector A + vector D . 5. vector P = vector C + vector D . 6. vector P = vector B + vector D . 7. vector P = vector A vector B . correct 8. vector P = vector C vector A. 9. vector P = vector B + vector A. 10. vector P = vector D vector A. Explanation: By the triangle method of addition vector B + vector P = vector A . Therefore vector P = vector A vector B . 004 (part 1 of 2) 10.0 points A golfer takes two putts to sink his ball in the sousse (res2468) HW 3 Kleinman (58225) 2 hole once he is on the green. The first putt displaces the ball 5 . 20 m east, and the second putt displaces it 2 . 51 m south. a) How large a displacement would put the ball in the hole in one putt? Correct answer: 5 . 77409 m. Explanation: Basic Concept: The displacements are perpendicular, so d = radicalBig ( x ) 2 + ( y ) 2 Given: x = 5 . 20 m y = 2 . 51 m Solution: d = radicalBig (5 . 2 m) 2 + ( 2 . 51 m) 2 = 5 . 77409 m 005 (part 2 of 2) 10.0 points b) What is the direction (measured from due east, with counterclockwise positive) of the...
View Full Document

Page1 / 13

hw3 - sousse (res2468) HW 3 Kleinman (58225) 1 This...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online