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Review the units of work, energy, force, and distance. Use the equations for mechanical energy and work to show what is work and what is not. Make it clear why holding something off the ground or carrying something over a level surface is not work in the scientific sense.
- 15.1 The Electromagnetic Spectrum
Teacher Support [BL] Explain that the term spectrum refers...
- 22.4 Nuclear Fission and Fusion
Given that it requires great energy separate two nucleons,...
- 23.1 The Four Fundamental Forces
Additionally, magnetic field strength is increased to keep...
- 11.1 Temperature and Thermal Energy
9.1 Work, Power, and the Work–Energy Theorem; 9.2 Mechanical...
- 22.1 The Structure of The Atom
Figure 22.10 An energy-level diagram plots energy vertically...
- 23.3 The Unification of Forces
As discussed earlier, the short ranges and large masses of...
- 21.3 The Dual Nature of Light
Figure 21.10 shows a comet with two prominent tails. Comet...
- 15.1 The Electromagnetic Spectrum
Calculate the energy efficiency and cost effectiveness of appliances and equipment. In an electric circuit, electrical energy is continuously converted into other forms of energy. For example, when a current flows in a conductor, electrical energy is converted into thermal energy within the conductor.
use the work done relationship to calculate energy gained or lost; use energy relationships to calculate work done
Ohm’s Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit as shown below. Ohms Law Relationship. By knowing any two values of the Voltage, Current or Resistance quantities we can use Ohms Law to find the third missing value.
Work, Energy and Power are fundamental concepts of Physics. Work is said to be done when a force (push or pull) applied to an object causes a displacement of the object. We define the capacity to do the work as energy. Power is the work done per unit of time.
Energy bar charts or even work-energy bar charts are conceptual tools that help to illustrate how the energy changes - both the form and the amount - as the object moves from the initial state to the final state.
Work, Energy, and Power. Lesson 1 - Basic Terminology and Concepts; Definition and Mathematics of Work; Calculating the Amount of Work Done by Forces; Potential Energy; Kinetic Energy; Mechanical Energy; Power; Lesson 2 - The Work-Energy Relationship; Internal vs. External Forces; Analysis of Situations Involving External Forces
