I have a packet that I really need to turn in soon. It's based on a trip to an amusement park, but I couldn't go, so I need some help. If someone can help me out with any of these questions tonight or tomorrow morning before 7:00 AM Pacfic, that would be great. Also, some of the questions are conceptual, so I may deviate from the template for just those ones. Question #1 1. How do you solve for speed using conservation of mechanical energy? The only variable given is the vertical distance - 52 meters. 2. Relevant equations: That's what I want to know! Just knowing what to use to solve this problem would help a lot. 3. The attempt at a solution: Don't even know where to start, I'm afraid. I'm not looking for an answer, just how to set the problem up. Question #2 1. How do you calculate the length of a pendulum when given time (22 s) and number of cycles (3)? 2. Relevant equations: None given. 3. The attempt at a solution: I calculated frequency (at .14 hz) and period (at 7.3 s). I don't know if either of those are right, but either way, I don't know what to do next to find length. Conceptual Questions: -"Where on a roller coaster may you feel like you're being lifted out of your seat? Why?" I haven't ridden a roller coaster in a long time, so I just can't picture this sensation. Any ideas? -Does free fall have a constant value? I have to compare the speed of a descent to the speed of free fall, but I don't know the latter. For some reason, I think it might be a constant value (9.6 sounds familiar). Is that correct? -"How do bumper cars get their energy?" I put that it has something to do with the metal floor and the antenna, but I have a feeling that isn't right. -Speaking of bumper cars, when they collide, do they bounce back at the same speed as before or a reduced speed? I put that it was the same, but I want to check for verification. EDIT: Of course, I don't expect any one person to help me with all of these. Any contribution at all would be great. Thank you. :) Of the 40 problems we have, these are the only 6 I'm struggling with.