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===About Deformation===
: [[Equilibrium Forces|Equilibrium forces]] are equal in [[magnitude]] but opposite in direction acting at different ends of an [[object]] to '''deform''' it. If there is only one [[force]] then the [[object]] will not '''deform''' it will just [[accelerate]].
: Some [[object]]s '''deform''' [[Plastic Inelastic Deformation|plasticallyinelastically]] which means they stay in their new shape after the [[force]]s are gone.
: Some [[object]]s '''deform''' [[Elastic Deformation|elastically]] which means they will return to their original shape when the [[force]]s are gone.