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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
As shown in Figure 22.26, a neutron strike can cause the...
- 23.1 The Four Fundamental Forces
Explain how particle accelerators work to gather evidence...
- 11.1 Temperature and Thermal Energy
Since heat, like work, transfers energy, it has the SI unit...
- 22.1 The Structure of The Atom
Bohr was able to derive the formula for the hydrogen...
- 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
Classical mechanics. 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.
Learn how to calculate the amount of work done by a force on an object using the formula W = F × D × cos (Θ). See examples of work problems and how work is related to energy and kinetic energy.
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.
Learn the concepts and formulas of work, energy and power in physics with examples and video explanations. Find out the units, types and applications of these physical quantities and how they are related to each other.
Learn how work is a measure of energy transfer using force and displacement, and how to calculate it with a simple formula. Explore the unit, dimensional formula, and types of work in physics.
Net work is defined to be the sum of work done by all external forces—that is, net work is the work done by the net external force \(F_{net}\). In equation form, this is \(W_{net} = F_{net}d \, cos \, \theta\), where \(\theta\) is the angle between the force vector and the displacement vector.
