Whenever one surface is moved over another there is always friction which always results in the transformation of some of the mechanical energy of the moving object into heat energy and in the wearing away of some of each surface.

McWeeney, Leo Francis2016-07-082016-07-0819531953b14684147https://hdl.handle.net/2144/16917Thesis (Ed.M.)--Boston Universityen-USBased on investigation of the BU Libraries' staff, this work is free of known copyright restrictions.Whenever one surface is moved over another there is always friction which always results in the transformation of some of the mechanical energy of the moving object into heat energy and in the wearing away of some of each surface.Thesis/Dissertation