# Download e-book for kindle: Study Guide for Sears and Zemansky’s University Physics, Set by Hugh D. Young; Roger Freedman; Laird Kramer

By Hugh D. Young; Roger Freedman; Laird Kramer

ISBN-10: 0321500334

ISBN-13: 9780321500335

ISBN-10: 0321500377

ISBN-13: 9780321500373

Read Online or Download Study Guide for Sears and Zemansky’s University Physics, Set - Chapters 1-44, 12E volume 1-3 PDF

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Example text

As it moves upward with the helicopter, the stone has a constant velocity Vy o . When it breaks loose and begins to fall freely, the stone has an initial velocity that is the same as the helicopter's and undergoes acceleration due to grav­ ity. We need to know the position, velocity, and time at the end of the first segment to solve for the sec­ ond segment. The velocity and time are given in the statement of the problem. S ET U P : We ignore effects due to the air. A vertical coordinate system is shown in the diagram, with the origin located on the ground and positive values directed upward.

2 Question 1 free-body diagrams. The vertical forces will not influence the horizontal interaction, so we look at the remaining force to determine how the winning team wins. The frictional forces must not be equal: The winning team exerts a larger frictional force on the ground than the losing team does in order to accelerate the losing team across the centerline. We see that free-body diagrams and Newton's third law were crucial in our solution. The free-body diagram helped reduce the complexity of the problem and helped show that the frictional EVA L U AT E 50 CHAPTER 4 force was responsible for the win.

We will use our knowledge of vectors to better understand forces and construct free-body diagrams. By the end of this chapter, we will have built a problem-solving framework that we will apply in the next chapter. Objectives After studying this chapter, you will understand The concept of force and why it is a vector quantity. How to identify forces acting on a body. How to find the resultant force acting on an object by summing multiple forces. Newton's three laws of motion. The relation between net force, mass, and acceleration.