In this lab, we find the work required to lift a load up a ramp at different angles.

Prepare your data table before you begin the lab.

Set up a ramp as shown on the board.

For five different angles, find the Fin needed to move the cart up the ramp at a constant velocity with three different masses.
Use force scales to determine the actual mechanical advantage (AMA).
Use meter sticks or protractors to determine the ideal mechanical advantage (IMA).
Compare the efficiencies of the three different masses for each incline.

Graph the efficiency of the inclined plane vs. the height or angle of the inclined plane.

Questions

1. What is the maximum efficiency you can expect from a machine? Why can’t it ever be higher? 1 point

2. Can the efficiency ever be equal to the maximum efficiency? Why or why not? 2 points

3. “You can’t win. You can’t break even. You can’t leave the game.” –ET Jaynes
Interpret this quote in terms of work and efficiency. 5 points

4. A compound machine consists of several simple machines. Find a compound machine at home, explain what types of simple machines are used in it, and describe their function.  2 points