Free system
Encyclopedia
A material system
which is subject to no other than internal and normal connections is called a free system. (H.Hertz 1956, p. 80, § 122)
System
System is a set of interacting or interdependent components forming an integrated whole....
which is subject to no other than internal and normal connections is called a free system. (H.Hertz 1956, p. 80, § 122)