Description: Participants will identify, use, and answer questions about simple machines and recognize the relationships between work, force and distance as they apply to each simple machine. Knowledge of the following six simple machines will be demonstrated: lever, inclined plane, pulley, screw, wheel and axle, and wedge.
Event Supervisor: George and Artie Martin
|Download the current rules here.|
| From the Event Coach Workshop.
|Sample test questions|
| Event Coach Workshop slides
|Click here to watch the very informative Workshop Video|
|This event uses an optical answer sheet Click to Learn more|
|Event Coach Workshop recap- be sure you're using the latest rules|
|See the Elementary Workshop List for this season|
The pizza cutter was used as an example of a tool where the fulcrum is considered to be the wrist or elbow of the user. Therefore, it is a third class lever.
You are correct that the answer key is wrong. The intent was to have two pulleys with the same Mechanical Advantage, but where one changes the direction of force but the other does not. However, the example was not well thought out.
The test you have from 2014 was the test used for the district competitions. It was provided to coaches, for reference only. It should have been destroyed after reviewing with the students in preparation for that year's regional competition.
No. Only simple calculations are necessary and do not require the use of a calculator. Scratch paper is provided for this purpose.
In the case of screws, students may be asked to evaluate how a change in diameter, or pitch will change the mechanical advantage.
Students will not use Pi in calculations. They only need to know when a formula for determining mechanical advantage includes Pi. Students will only be asked to estimate or approximate mechanical advantage.