Please explain each response to each prompt using physics terms/ideas/formulas/proofs. I would like to check my own work. Please NO REPOSTS of other work.

Note: reference is below.

Practice Problems (3.) The pendulum moves in two dimensions, but polar coordinates (r, 6) are better than Cartesian coordinates (.r, 3;). Where should we put the origin in our polar coordinate system? (1)} Does r, the radial coordinate of the mass on the pendulum, change as it swings? c W'rite out the force balance e