Work was done by an external force acting on an object to accelerate it: W =+deltaE Work was done by the object itself t

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Work was done by an external force acting on an object to accelerate it: W =+deltaE Work was done by the object itself t

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Work was done by an external force acting on an object to accelerate it: W =+deltaE
Work was done by the object itself to overcome the action of an external force:W =-deltaE
Law of Conservation of energy: In an isolated system, in the absence of non-polential forces, the total mechanical energy is conserved.
Offer two examples of systems for which mechanical energy is conserved. Using the statement above as a reference, explain why the energy in these systems should indeed be conserved.
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