- A. General Materials & Mathematics
- B. Statics
- C. Kinematics & Dynamics
- D. Rotational Mechanics
- E. Gravitation & Astronomy
- F. Fluid Mechanics
- G. Vibrations & Mechanical Waves
- H. Sound
- I. Thermodynamics
- J. Electrostatics & Magnetostatics
- K. Electromagnetic Principles
- L. Geometrical Optics
- M. Wave Optics
- N. Spectra & Color
- O. Vision
- P. Modern Physics
Levers - Three Classes
Demonstrate how the three classes of levers operate and how they are different.
Two-meter demonstration scale, 20 Newton self-weighing spring scale, 20 Newton normal spring scale, mass hanger with three 1 kg masses, string loop.
Look this over before class; you must change around the various components during the lecture.
Referring to the three photographs above: First class lever (right): the pivot is between the load and the applied force (push down with hand or pull down with spring scale at right of photo). Second class lever (left): the load is between the pivot and the applied force. Third class lever (center): the applied force is between the load and the pivot.