<p>you DO need to memorize formulas, and you CAN lose points for “guessing or reasoning it out” on part 2. for example, if you put more than the number of vectors specified in the answer key (lets say you put Tx, Ty, and T all on one pulley free-body diagram), you will get a point off. any unnecessary ******** added to the part 2 questions WILL lose you points. be careful.</p>