Vector and Kinematics in Two Dimensions - Assignment | PHYS 2414, Assignments of Physics

Download Vector and Kinematics in Two Dimensions - Assignment | PHYS 2414 and more Assignments Physics in PDF only on Docsity! PHYSICS 2414 Fall 1999 Unit 2 - Vectors and Kinematics in Two Dimensions Reading: Sections 3.0 - 3.8 Homework: Chapter 3 - Questions 5,8 Problems 9,11,23,27,35,38,51,52,55,73 Problems (on this Assignment Sheet): A,B,C Dates: • Reading Questions (Chapter 3) .. . . . . . . . . . . Wednesday, September 8, 8:00 a.m. • Homework Due... . . . . . . . . . . . . . . . . . . . . . . . . . . . Wednesday, September 15, 5:00 p.m. • Midterm on Units 1 & 2 .. . . . . . . . . . . . . . . . . . . Friday, September 17 Homework may be turned in during class on Wednesday, or placed in the box outside of my office before 5:00 p.m. Solutions to the homework will be in Bizzell library, the Physics library, and on the web page by 5:00 p.m. on Wednesday. If you want to use your homework to help you study for the midterm, I suggest you photocopy your homework before turning it in, then compare your photocopied homework with the solutions. Reading questions are to be submitted directly from the World Wide Web using the form available at http://www.nhn.ou.edu/~strauss/phys2424. If you try to submit answers to the reading questions on the web, but the answers are rejected, please e-mail me at mgstrauss@ou.edu and describe the problem in detail. READING QUESTIONS FROM CHAPTER 3: 1. What is the difference between a vector and a scalar? 2. Which variables discussed Chapters 2 and 3 are vectors and which are scalars? 3. How are vectors added and subtracted graphically? 4. How are vectors added and subtracted analytically? 5. What are the components of a vector? 6. How do you determine the magnitude and direction of the components of a vector? 7. When dealing with projectile motion, what is true about the accelerations in the vertical and horizontal direction? 8. What does this imply about the motion in the vertical and horizontal directions? 9. Can acceleration and velocity be in different directions? If so give two examples of this situation. 10. A ball is thrown up in the air. Describe the direction of acceleration during the entire flight of the ball. 11. Neglecting air resistance, what kind of path do objects follow in a constant gravitational field (when the acceleration due to gravity is a constant)? 12. Is this true of an object that is thrown straight up? Final Question (must be answered to receive any credit on the reading assignment): What is one thing from the reading that you didn’t understand or need clarified? ADDITIONAL HOMEWORK PROBLEMS (not Reading Questions) Problem A: A golf ball is driven from a level fairway. At a time of 5.10 s later, the ball is traveling downward with a velocity of 48.6 m/s at an angle of 22.2° below the horizontal Calculate the initial velocity (magnitude and direction) of the golf ball. Problems B and C must be solved using the form and all the steps in The Competent Problem Solver) Problem B: You are playing golf with a friend and have hit the ball in the rough to the left of the fairway. You are not far from the green that sits on a hill 4.90 m higher than your feet. Between you and the green stands a tree that is 9.80 m higher than your feet at its tallest point and 15.0 m in front of you which makes the shot difficult. Your friend doesn’t believe you can clear the tree and land on the green. You do a quick physics calculation to determine exactly what club should be