Some potential investigatory projects that are related to physics include investigating whether repulsorlifts can be used as a method of stable, magnetic levitation, constructing a free-fall apparatus in the absence of equipment, the use of para-toluenesulfonate-doped polypyrolle as an EMF electrode source, and using elastomeric grating for wavelength switching. These are projects or experiments that have been previously carried out and may be repeated to compare results.
In some cases, not enough funds are available to purchase materials necessary for a lab or school classroom. Finding ways to create these materials allows an educator to save money while still demonstrating the concept to the class. Such was the case when educators decided to build and test the effectiveness of a free-fall apparatus used in elementary and secondary-level physics classes. This was necessary because many public schools lack the funding to purchase such equipment.
A free-fall apparatus is used to measure the time it takes for a falling object to hit the switch pad from a certain point. A device was built from planks of wood, and the electromagnet was powered by a 3-volt battery and was attached to the device with a paper clip. The apparatus proved to be just as effective as an original machine.