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When the only forces present in a system are conservative, [[mechanical energy]] is conserved.
When the only forces present in a system are conservative, [[mechanical energy]] is conserved.
Examples of Conservative forces:
Examples of conservative forces:
* [[Gravitational force]]
* [[Gravitational force]]
* [[Hooke's Law|force performed by a spring]]
* [[Hooke's Law|force performed by a spring]]
Example of a non-conservative force:
*[[friction]]
== References ==
== References ==