Force Diagram Practice
(2 Subjects)
For problems involving two or more subjects you should draw a force diagram for each subject. For each of the following problems, draw the force diagram for the subjects, in order corresponding to their numbers in the figure (1, then 2). Once you successfully complete the diagram for the first subject, forces on the second subject that are required to be equal in magnitude to forces on the first subject (e.g., due to Newton's 3rd law or a common tension in a rope) are automatically drawn for you.
Use normal and frictional components where appropriate. For each force diagram, the Red Dot is an indication of the sum of the forces (net force) that you have drawn at any given time; the direction of the net force is given in red. Briefly, from reading the problem you will need to determine whether the net force should be zero or not. Then change the direction and/or magnitude of one or more of the force vectors to put the dot at the center (for zero net force) or in the correct direction (for non-zero net force).