[单选题]
"The total angular momentum n j+bb+1v4mqqagz:yza7 (i 6zof mwx87 3g2 zji, j,2f) bbqiytba system of particles changes when a net external f,z,i2bmb w3ji)xgjqt 7fyb8 2orce acts on the system." This statement 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