Figure 10.1 Brazos wind farm in west Texas. During 2019, wind farms in the United States had an average power output of 34 gigawatts, which is enough to power 28 million homes. (credit: modification of work by U.S. Department of Energy) Chapter…
9.1 Linear Momentum 9.2 Impulse and Collisions 9.3 Conservation of Linear Momentum 9.4 Types of Collisions 9.5 Collisions in Multiple Dimensions 9.6 Center of Mass 9.7 Rocket Propulsion
Learning Objectives By the end of this section, you will be able to: Now we deal with the case where the mass of an object is changing. We analyze the motion of a rocket, which changes its velocity (and hence…
Learning Objectives By the end of this section, you will be able to: We have been avoiding an important issue up to now: When we say that an object moves (more correctly, accelerates) in a way that obeys Newton’s second…
Learning Objectives By the end of this section, you will be able to: It is far more common for collisions to occur in two dimensions; that is, the angle between the initial velocity vectors is neither zero nor 180°. Let’s see…
Learning Objectives By the end of this section, you will be able to: Although momentum is conserved in all interactions, not all interactions (collisions or explosions) are the same. The possibilities include: It’s useful, therefore, to categorize different types of…
Learning Objectives By the end of this section, you will be able to: Recall Newton’s third law: When two objects of masses m1 and m2 interact (meaning that they apply forces on each other), the force that object 2 applies to object 1 is…
Learning Objectives By the end of this section, you will be able to: We have defined momentum to be the product of mass and velocity. Therefore, if an object’s velocity should change (due to the application of a force on…
Learning Objectives By the end of this section, you will be able to: Our study of kinetic energy showed that a complete understanding of an object’s motion must include both its mass and its velocity (K=(1/2)mv2). However, as powerful as…
Figure 9.1 The concepts of impulse, momentum, and center of mass are crucial for a major-league baseball player to successfully get a hit. If he misjudges these quantities, he might break his bat instead. (credit: modification of work by “Cathy T”/Flickr) Chapter…