## Chapter 12: Kinematics

Kinematics is the study of objects in motion, without asking anything about why the object is moving. We will focus on translational motion with constant acceleration. 12.1 One-dimensional kinematics Say you are driving in a car along a long, straight Continue Reading

## Chapter 11: Torque

11.4 Problem solving The process for solving problems with torque is nearly identical to the process for solving problems with force (see section 9.4). However, instead of a free body diagram—which represents the system as a single point—we’ll use an Continue Reading

## Chapter 11: Torque

11.2 Newton’s laws, applied to rotation As we have seen throughout this entire course, physical quantities dealing with translational motion tend to have analogous counterparts for rotation. We can think of two of Newton’s laws in terms of rotation: Inertia: Continue Reading

## Chapter 10: Work

10.2: Work and energy Imagine now that I’m picking up my 7 kg cat from section 10.1. I need to exert some force to do so, and I increase his potential energy—the work I did on him was positive. Now Continue Reading

## Chapter 9: Force

9.8 Universal gravitation Imagine that you launch a cannonball straight out of a cannon; it goes a bit, then lands. What happens if you shoot it with a bit more velocity? What if you shoot it really fast? You could shoot it Continue Reading