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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
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.
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.
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.
In this section we begin the study of various types of work and forms of energy. We will find that some types of work leave the energy of a system constant, for example, whereas others change the system in some way, such as making it move. We will also develop definitions of important forms of energy, such as the energy of motion.
The translational kinetic energy of an object of mass \(m\) moving at speed \(v\) is \(KE = \frac{1}{2}mv^2\). The work-energy theorem states that the net work \(W_{net} \) on a system changes its kinetic energy, \(W_{net} = \frac{1}{2}mv^2 - \frac{1}{2}mv_0^2\). 7.3: Gravitational Potential Energy Work done against gravity in lifting an object ...
In physics, work represents a type of energy. Work is done when a force acts on something that undergoes a displacement from one position to another. Forces can vary as a function of position, and displacements can be along various paths between two points.
