POE Simple Machine Investigation 8232016 First Class Lever

POE Simple Machine Investigation 8/23/2016

First Class Lever • Pt 1 move fulcrum to hole 13, counter weight to hole 25, your hand at hole 1 • Have each team member lift counter weight • Pt 2 move fulcrum to hole 8, counter weight to hole 25, your hand at hole 1 • Have each team member lift counter weight • Pt 3 move fulcrum to hole 19, counter weight to hole 25, your hand at hole 1 • Have each team member lift counter weight

1 st class lever cont. • Which lever required less force to lift the counter weight? • Why? • Calculate the IMA of each 1 st class lever.

Second class lever • Move fulcrum to hole 2, counter weight to hole 16 and your hand at hole 25 • Have each team member lift the counter weight • How is a second class lever different from a first class lever/ • Calculate the IMA of the second class lever.

Third Class Lever • Move fulcrum to hole 2, counter weight to hole 25 and your hand at hole 9 • What makes this lever different from the others? • Calculate the IMA. • Out of all three levers which do you prefer? Why?

Wheel and Axle • Pt 1 Using a string attach the weight to the axle, use your fingers to turn the wheel • Each team member takes a turning the wheel • Pt 2 using the string attach the weight to the wheel, use your fingers to turn the axle • Each team member takes a turning the wheel • Calculate the IMA for both systems

Pulleys • Use the system to create the fixed pulley, moveable pulley, and the block and tackle. • Have each team member pull the string for each pulley system • Which pulley system required less effort? Why? • Calculate the IMA for each pulley system.

Inclined plane • Using the string to pull the weight up the incline plane • Each team member takes a turn pulling the weight • Measure the length of the plane and the height, Calculate the IMA

Screw • Do you think a screw is efficient? • Calculate the IMA of the screw