[单选题]
"The total angular momentum ohbxx(2 9ijevxe )yd.2f a icq0d5j0u,dj-z90b- jxoe agsystem of particles changes when a net external force acts on the system." This statementdujzij-5oq g,x0eac9 j00db - is
A. always true.
B. never true.
C. sometimes true. It depends on the force's magnitude.
D. sometimes true. It depends on the force's point of application.
Post time 2024-1-22 02:51:16