Forces of this type have vector fields that are path independent—a common example is gravity, while a common counterexample is friction. This same term, sometimes with a different suffix, also is applied to certain quantities, and it was applied to parity inversions until the 1950s. Two quantities it applies to are linear and angular momentum. Give this term that used to apply to matter, mass, and energy separately until 
Forces of this type have vector fields that are path independent—a common example is gravity, while a common counterexample is friction. This same term, sometimes with a different suffix, also is applied to certain quantities, and it was applied to parity inversions until the 1950s. Two quantities it applies to are linear and angular momentum. Give this term that used to apply to matter, mass, and energy separately until they were combined to account for the Theory of Relativity.
Forces of this type have vector fields that are path independent—a common example is gravity, while a common counterexample is friction.