Lesson 4: Work and Energy# Lesson contents: Lesson 4: Basic Concepts of Work and Energy Applied to Mechanisms Introduction: The Energy Approach Fundamental Concepts Work-Energy Theorem Mechanical Advantage Application Example: Toggle Position (Crusher) Passive Resistances Efficiency (\(\eta\)) and Actuator Selection Lesson Summary Lesson 4: Application Examples (Work, MA and Passive Resistances) Example 4.1: Ideal Mechanical Advantage (IMA) Analysis via PVW Example 4.2: Friction in Prismatic Joints (Wedge) Example 4.3: Friction in Revolute Joints (Friction Circle) Example 4.4: Efficiency and Overall Power Analysis