A screw has been attached to our slab, as we turn the screw the slab is lifted a certain distance. How far it is lifted each turn is determined by how far apart the threads are. The number of threads per a given distance is called thread density.
You will test our flood gate using several thread densities. The force applied and the distance the gate is lifted will be recorded. Select a thread density and click on the "Lift!" button. We will experiment with the wheel diameter in the next lab, so leave this fixed for this test.
Table 1: The Screw and the Axle
Be sure to copy these numbers into your lab packet after each test. Test at least 5 different settings.
Graphing - 1::
Use the data from Table 1 to complete the graphs 1A and 1B in your lab packet to help you interpret the data.
1. As the number of threads increases what happens to the distance the wheel is turned to lift the gate?
2. As the number of threads increases what happens to the amount of force needed to turn the wheel?
Talk Now - 3b