Search results
The Work-Energy Theorem explains that when net work is done on an object, the object speeds up. The ideas in this section set the stage for the second conservation law, the Law of Conservation of Energy which is the topic of the next section.
Work-Energy Theorem: W = ΔK + ΔU g = ΔE •The total energy of a system changes by the amount of work done on it. •When a net force performs work on an object, the result could be a change in the kinetic energy of the object and/or a change in the potential energy.
This is the work-energy theorem, which states that the work done by the resultant force F acting on a particle as it move from point 1 to point 2 along its trajectory is equal to the change in the kinetic energy (T 2 −T 1 ) of the particle during the given displacement.
Learn about the scientific definition of work, the work-energy theorem, potential energy, conservative and nonconservative forces, and the law of conservation of energy. Explore the forms, sources, and uses of energy in the world with examples and applications.
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. Let’s look at work and KE. Definition of work done by a force: consider an object moving while a constant force F is applied to the object.
Work-Energy Theorem. The total energy of a system changes by the amount of work done on it. When a net force performs work on an object, the result could be a change in the kinetic energy of the object. If the work done by the net force is positive, the kinetic energy of the object increases.
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.
