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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
22.4 Nuclear Fission and Fusion - 9.1 Work, Power, and the...
- 23.1 The Four Fundamental Forces
23.1 The Four Fundamental Forces - 9.1 Work, Power, and the...
- 11.1 Temperature and Thermal Energy
Since heat, like work, transfers energy, it has the SI unit...
- 22.1 The Structure of The Atom
22.1 The Structure of The Atom - 9.1 Work, Power, and the...
- 23.3 The Unification of Forces
As discussed earlier, the short ranges and large masses of...
- 21.3 The Dual Nature of Light
21.3 The Dual Nature of Light - 9.1 Work, Power, and the...
- 15.1 The Electromagnetic Spectrum
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.
The principle of work and kinetic energy (also known as the work-energy theorem) states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle.
Explain work as a transfer of energy and net work as the work done by the net force. Explain and apply the work-energy theorem.
Use the work-energy theorem to find information about the forces acting on a particle, given information about its motion. We have discussed how to find the work done on a particle by the forces that act on it, but how is that work manifested in the motion of the particle?
Work-Energy Theorem argues the net work done on a particle equals the change in the particle’s kinetic energy. According to this theorem, when an object slows down, its final kinetic energy is …
Explain work as a transfer of energy and net work as the work done by the net force. Explain and apply the work-energy theorem. Work Transfers Energy. What happens to the work done on a system? Energy is transferred into the system, but in what form? Does it remain in the system or move on? The answers depend on the situation.
