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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
Understanding the Four Forces. The gravitational force is...
- 11.1 Temperature and Thermal Energy
Since heat, like work, transfers energy, it has the SI unit...
- 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
Also, eV is used by scientists to describe the binding...
- 15.1 The Electromagnetic Spectrum
24 kwi 2023 · This page will first explore the definition of work, then proceed to explain the relationship between work and energy, specifically the Work-Energy Theorem, which states that the net work that acts on a particle is equivalent to the change in kinetic energy of the particle.
To understand energy and conservation of energy, we must first define some terms: work, kinetic energy (KE), and potential energy (PE). We’ll get to PE in the next Chapter.
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 more about work and energy in this PhET simulation called “the ramp.” Try changing the force pushing the box and the frictional force along the incline. The work and energy plots can be examined to note the total work done and change in kinetic energy of the box.
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.
