Depending on your year/make/model, you could have a malfunctioning IAC valve, or vacuum leak, stuck accelerator cable/linkage, or possibly drive-by-wire issues if your car is equipped with the last one... This Site Might Help You. When my car is in park it revs to 2 rpms. When I put my car into park the rpms are still revving at 1 to 2. And sometimes I hear it happening and notice the arrow going up.
Biomechanics is the study of the structures and materials of human, plant, and animal life and the effect of external stimuli upon these systems. The field is a cutting-edge science, but it has ancient roots.
Mechanization or mechanisation is the process of changing from working largely or exclusively by hand or with animals to doing that work with machinery. In an early engineering text a machine is defined as follows: Every machine is constructed for the purpose of performing certain mechanical operations, each of which supposes the existence of two other things besides the machine in question, namely, a moving power, and an object subject to the operation, which may be termed the work to be done.