Kinetic Energy
Learning Objectives By the end of this section, you will be able to: It’s plausible to suppose that the greater the velocity of a body, the greater effect it could have on other bodies. This does not depend on the…
Work
Learning Objectives By the end of this section, you will be able to: In physics, work is done on an object when energy is transferred to the object. In other words, work is done when a force acts on something that undergoes…
Introduction
Figure 7.1 A sprinter exerts her maximum power with the greatest force in the short time her foot is in contact with the ground. This adds to her kinetic energy, preventing her from slowing down during the race. Pushing back hard on…
Summary
6.1 Solving Problems with Newton’s Laws 6.2 Friction 6.3 Centripetal Force 6.4 Drag Force and Terminal Speed
Drag Force and Terminal Speed
Learning Objectives By the end of this section, you will be able to: Another interesting force in everyday life is the force of drag on an object when it is moving in a fluid (either a gas or a liquid).…
Centripetal Force
Learning Objectives By the end of this section, you will be able to: In Motion in Two and Three Dimensions, we examined the basic concepts of circular motion. An object undergoing circular motion, like one of the race cars shown at…
Friction
Learning Objectives By the end of this section, you will be able to: When a body is in motion, it has resistance because the body interacts with its surroundings. This resistance is a force of friction. Friction opposes relative motion…
Solving Problems with Newton Laws
Learning Objectives By the end of this section, you will be able to: Success in problem solving is necessary to understand and apply physical principles. We developed a pattern of analyzing and setting up the solutions to problems involving Newton’s…
Introduction
Figure 6.1 Stock cars racing in the Grand National Divisional race at Iowa Speedway in May, 2015. Cars often reach speeds of 200 mph (320 km/h). (credit: modification of work by Erik Schneider Navy) Chapter Outline 6.1 Solving Problems with Newton’s Laws 6.2 Friction…
Summary
5.1 Forces 5.2 Newton’s First Law 5.3 Newton’s Second Law 5.4 Mass and Weight 5.5 Newton’s Third Law 5.6 Common Forces 5.7 Drawing Free-Body Diagrams