About This Chapter
Work & Energy Theorems in Physics - Chapter Summary
In this chapter, you will review how work is done by variable force and how to calculate it. The relationship, differences and similarities between potential energy and kinetic energy will be introduced. The work-energy theorem and how it applies in physics will also be discussed.
As you move on through the lessons, you'll learn how power is defined in physics as well as the concepts of conservative force and the conservation of mechanical energy. Once you have completed this chapter, you should be able to:
- Calculate variable force
- Describe the relationship between kinetic and potential energy
- Explain how work and energy function together in physics
- Differentiate between work and power
- Give examples of conservative forces
- Detail how mechanical energy is transferred between objects
Either before or after you watch the video lessons, take the quizzes and chapter test to ascertain where you should focus your study. Use the video tabs feature in the Timeline to skip to specific parts of the video that you would like to watch. Transcripts of these lessons can be printed and used as learning tools for offline review. At any time, these study materials can be accessed on any computer, mobile phone or tablet.
1. Work Done by a Variable Force
Doing work on an object is a simple concept: we apply a certain force over a certain distance. But in real life, that force is rarely constant. Therefore, we need to understand variable forces and be able to calculate them accurately.
2. Kinetic Energy to Potential Energy: Relationship in Different Energy Types
This video defines and describes kinetic and potential energy. You'll learn how different types of energy can be classified as potential and kinetic. You'll also find out how kinetic and potential energy are transformed.
3. Work-Energy Theorem: Definition and Application
Work and energy are closely related in physics. In this lesson, you'll learn what that relationship is as well as how we can apply it to various situations.
4. Power: Definition and Mathematics
Work involves moving an object with a force, but power tells us how quickly that work is done. In this lesson, you will learn about how power depends on both work and time as well as see examples of how to calculate power.
5. Conservative Forces: Examples & Effects
Learn how to tell if a force is conservative and what exactly is being conserved. Then look at a couple of specific examples of forces to see how they are conservative.
6. Conservation of Mechanical Energy
Energy comes in many forms and for any system can never be created or destroyed. This holds true for mechanical energy, which also obeys this law of conservation of energy. In this video lesson, you'll explore how mechanical energy is converted or transferred between forms and objects.
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Other chapters within the BITSAT Exam - Physics: Study Guide & Test Prep course
- Tools & Methods of Scientific Measurement
- Kinematics & Vectors
- Newtonian Laws of Motion
- Impulse & Momentum
- Rotation & Angular Momentum
- Gravitational Laws
- Solid & Fluid Mechanics
- Oscillators & Simple Harmonic Motion
- Wave Types & the Doppler Effect
- Heat & Thermodynamics
- Electrostatics & Charge
- Simple Electric Circuits
- Electronic Devices & Components
- Current & Magnetism
- Electromagnetic Induction
- Optics Overview
- Modern Physics Principles & Theories
- BITSAT Exam - Physics Flashcards