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The work-energy theorem states that the net work done by the forces on an object equals the change in its kinetic energy. Learn more. For deeper explanations of the work-energy theorem, see our video work and the work-energy principle.
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 Fnet. In equation form, this is Wnet = Fnetdcosθ, where θ is the angle between the force vector and the displacement vector.
The work-energy theorem states that the net work done by all forces acting on a system equals its change in kinetic energy (KE). In equation form, this is: \[\mathrm{W_{net}=\dfrac{1}{2}mv^2−\dfrac{1}{2}mv_0^2=ΔKE.}\]
16 sie 2021 · The net work \ (W_ {net}\) is the work done by the net force acting on an object. Work done on an object transfers energy to the object. The translational kinetic energy of an object of mass \ (m\) ….
22 gru 2020 · The work-energy theorem, also called the work-energy principle, is a foundational idea in physics. It states that an object's change in kinetic energy is equal to the work performed on that object. Work, which can be negative, is usually expressed in N⋅m, while energy is usually expressed in J.
When work done on an object increases only its kinetic energy, then the net work equals the change in the value of the quantity 1 2 m v 2 1 2 m v 2. This is a statement of the work–energy theorem , which is expressed mathematically as
The net work done by external forces on an object or system is equal to the change in total energy of that system: \begin{equation*} W_{net,external} = \Delta E \end{equation*} In fact, it is used throughout essentially all of science.
