In the following diagram, the magnitude of force ... ...

    In the following diagram, the magnitude of force FA is 400 N, and that of FB is 300 N. What is the magnitude of the net force in the three cases? Image
(A) In case 1, the net force is 100 N; case 2, 700 N; and case 3, 500 N.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in 03. Laws of Motion