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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
15.1 The Electromagnetic Spectrum - 9.1 Work, Power, and the...
- 22.4 Nuclear Fission and Fusion
Figure 22.29 shows an energy-mass curve commonly used to...
- 23.1 The Four Fundamental Forces
The more energy input or ΔE, the more matter m can be...
- 11.1 Temperature and Thermal Energy
11.1 Temperature and Thermal Energy - 9.1 Work, Power, and...
- 22.1 The Structure of The Atom
The energy required to change the orbital state of 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
Concepts of work, kinetic energy and potential energy are discussed; these concepts are combined with the work-energy theorem to provide a convenient means of analyzing an object or system of objects moving between an initial and final state.
In science, work is the energy transferred to or from an object via the application of force along a displacement. In its simplest form, for a constant force aligned with the direction of motion, the work equals the product of the force strength and the distance traveled.
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.
Learn about work and energy, their definitions, formulas, and examples in physics. Find out the difference between work and energy, the principle of work and energy, and the types of work and energy.
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 is the transfer of energy by a force acting on an object as it is displaced. The work W W. that a force F F. does on an object is the product of the magnitude F F. of the force, times the magnitude d d. of the displacement, times the cosine of the angle θ θ. between them. In symbols, W = Fd cos θ.
