9.4: Problem solving steps We’ll follow the same problem-solving steps as with problems dealing with conservation laws, but this time we’ll add an intermediate step between the drawing and the math: Draw a picture. Using your picture, draw a free Continue Reading
9.3 Types of forces Sometimes we will refer to a force being “applied.” We use this somewhat generically, though it often is used to describe the force exerted by a push. We use the symbol F app. In the case Continue Reading
9.2 Newton’s laws In the late 1600’s and early 1700’s, Isaac Newton published the Principia Mathematica in which he built upon discoveries of scientists (at the time called “natural philosophers”) before him, laying the foundation of classical mechanics. In the Principia, he described Continue Reading
9.1 What is a force? You can think of a force as a push or a pull, but really forces describe interactions between two objects. Forces cause changes in motion. Generally speaking, we have have two models that we use to understand interactions between Continue Reading
8.3: Collisions In addition to describing the rotational motion of a single object while it’s moment of inertia changes, we can also look at what happens when two rotating objects collide. Example Practice Practice Practice Practice
8.2 Conservation of angular momentum Just like linear momentum , if there is no external influence acting on an object, then angular momentum is conserved. A very important result of this describes how a body’s angular speed changes as mass Continue Reading
7.3 Ballistic pendulum A ballistic pendulum is a device that used to be used to determine the velocity of a bullet; it was invented in 1742 by English mathematician Benjamin Robins for this purpose. A simple version consists of a block of Continue Reading
6.2 Inertia A property closely tied to energy is a property called inertia. This is a physical property that can be used to describe an object. Back at the beginning of the chapter, we looked at an example of a stationary Continue Reading
3.4 Unit conversions Sometimes it is necessary to convert between measurements in different units. Conversions within the metric system are straightforward—it designed intentionally for this to be the case. Conversions between metric units and customary units (which is what we Continue Reading
3.3 The SI system The metric system is used by every country in the world except for Liberia, Myanmar, and the United States of America. In the metric system, you have a base unit that tells you what kind of quantity Continue Reading