Project+outline

= = = = __Design Project: Trebuchet__

**Purpose:** To provide the Physics 30 student with hands-on application of the principles of physics and an opportunity for creativity. ** Assignment: ** Build a trebuchet. ** Evaluation Criteria: ** 1. Your working model is worth 40 points 2. Your machine's performance is worth 35 points. We will award from 1 to 35 points based on the efficiency of your trebuchet as defined by the ratio of the distance the projectile travels (measured from and level with the pivot) over the product of mass (Kilograms) of your trebuchet and the length of your trebuchet's arm (fully extended including slings). Highest performance receives 35 prorated to where the lowest receives 1.
 * Constraints: **
 * This project may be completed individually or in groups of two.
 * Counterweights are the only source of hurling power allowed. (No elastics or bungees)
 * All groups will launch **__identical__** plastic xmas balls, supplied by the teacher.
 * You may not launch dangerous projectiles at any time.
 * The __maximum__ size when loaded and prepared to fire is 1 m3.
 * You will be given November 13th and 20th, and December 4th in class to work on your project.
 * The trebuchet must be assembled and turned in by December 11th, 2005.
 * Your project assignment must be turned in by Monday December 14th, 2005.

P = (d) / (m)(L)
3. Your project wiki is worth 25 points. Your page must include: 4. This design project is worth a total of 100 points.
 * A brief discussion of the applicable physics principles.
 * The procedure you used to build your trebuchet.
 * A list of materials.
 * A labeled drawing or photo of your trebuchet.
 * The procedure you used to test your trebuchet.
 * Measurements and calculations of device and its performance over 8 test trails and a tabular record of that performance on the project table on the evaluation sheet.
 * An analysis of any changes you made to maximize your trebuchet's efficiency.