Module 7: Momentum

Module 7: Momentum

Introduction

Momentum is a so basic a concept in physics that Sir Isaac Newton referred to is as "quantity of motion", and built his laws around it. Some textbooks introduce momentum before kinetic energy, here we introduce it afterwards, but either way the conservation of momentum has one outstanding feature not shared by kinetic energy, there is never any situation when the net momentum of a system is not conserved. 

Learning Objectives

Upon completion of this module, students will be able to: 

  • Define momentum, and calculate the momentum of a system
  • Solve problems using the principle of conservation of momentum
  • Differentiate between the types of collisions, particularly elastic and inelastic collisions
  • Determine when kinetic energy and momentum conservation can be used in combination 
  • Define impulse
  • Solve problems by using the concept of impulse
  • Provide examples of momentum conservation

To Do List 

1. Watch the Video Lectures (links below)
2. Complete the Practice Problems (links below)
3. Take the Module 7 Quiz
4. Complete the Exam Practice Problems for Module 7

Lessons

Lesson 7.1 Momentum Conservation

The momentum of a body is defined, and it is shown how conservation of momentum can be applied to a series of different problems.

Lesson 7.2 Collision Types

Different types of collisions are investigated, in particular, elastic and inelastic collisions are differentiated.

Lesson 7.3 Impulse

Impulse is introduced as an easy way of quickly coming to the answer to many questions that would otherwise use complicated algebra and mathematics.

Quiz

Once you have watched the lectures and completed the practice problems, you should demonstrate your understanding by taking the Module 7 Quiz. Be sure to submit the quiz before its deadline.

Coming Up

In the next Module we will learn about Rotational Motion and Equilibrium.