Questions
Due in class (10 AM) on Wednesday Feb. 18.
- Assignment 3 on our MasteringPhysics course site. I have retroactively lifted the penalty for incorrectly answering a multiple choice question because the penalty was being applied even inside hints, which I consider contrary to the spirit of the hints. Please don't use this as an excuse to just randomly try answers until you hit on the correct one. I have decided not to limit the number of attempts, since MasteringPhysics can be unreasonably picky.
- Y&F end of chapter problems.
- 3.29
- 3.34
- 3.38
- 3.86
- 4.24
- 4.27
- Back to the accelerometer. I drove over to the circle located just down the hill from Frost Library (towards College Street) and recorded acceleration data as I drove around the circle at constant speed (as best I could while watching for loitering students and campus police). Note that you cannot assume that I started taking data from rest. It took me about 40s to get up to a reasonably constant speed, and I braked to avoid some pedestrians a little after 110s.
- How fast was I driving? You can consider the acceleration from 40 to 110s to be constant. Hint: you don't need to use numerical integration here.
- Was I turning left or right? You need to know the orientation of the accelerometer's axes on the roof of my car: see the figure that's meant to be a car with headlights and windshield wipers and a luggage rack on top.
- Part 1 only of the following (click to enlarge to readable size). Part 2 looks pretty hard: I don't think I can write down a closed-form solution myself. If you really want to try it go ahead. Part 3 is a search / optimization problem which is more appropriate for a computer science course.
