LEARNING OBJECTIVES By the end of this section, you will be able to: Angular momentum is a vector and, therefore, has direction as well as magnitude. Torque affects both the direction and the magnitude of angular momentum. What is the direction…
LEARNING OBJECTIVES By the end of this section, you will be able to: Bowling pins are sent flying and spinning when hit by a bowling ball—angular momentum as well as linear momentum and energy have been imparted to the pins.…
LEARNING OBJECTIVES By the end of this section, you will be able to: Why does Earth keep on spinning? What started it spinning to begin with? And how does an ice skater manage to spin faster and faster simply by…
LEARNING OBJECTIVES By the end of this section, you will be able to: In this module, we will learn about work and energy associated with rotational motion. Figure 10.13 shows a worker using an electric grindstone propelled by a motor. Sparks are…
LEARNING OBJECTIVES By the end of this section, you will be able to: Just by using our intuition, we can begin to see how rotational quantities like θ𝜃, ω𝜔, and α𝛼 are related to one another. For example, if a motorcycle wheel has a…
LEARNING OBJECTIVES By the end of this section, you will be able to: Uniform Circular Motion and Gravitation discussed only uniform circular motion, which is motion in a circle at constant speed and, hence, constant angular velocity. Recall that angular velocity ω𝜔 was…
Figure 10.1 The mention of a tornado conjures up images of raw destructive power. Tornadoes blow houses away as if they were made of paper and have been known to pierce tree trunks with pieces of straw. They descend from clouds in…
The First Condition for Equilibrium The Second Condition for Equilibrium Stability Applications of Statics, Including Problem-Solving Strategies Simple Machines Forces and Torques in Muscles and Joints
LEARNING OBJECTIVES By the end of this section, you will be able to: Muscles, bones, and joints are some of the most interesting applications of statics. There are some surprises. Muscles, for example, exert far greater forces than we might…
LEARNING OBJECTIVES By the end of this section, you will be able to: Simple machines are devices that can be used to multiply or augment a force that we apply – often at the expense of a distance through which…