APA 2114 Lecture Notes - Lecture 15: Rigid Body, Angular Displacement, Gravitational Energy
15 Oct 2018
School
Department
Course
Professor
Document Summary
Types of energy: mass energy (e=mc2, solar/light energy (solar panels, electricity, chemical energy (atp, thermal energy (heat, sound, mechanical energy- most important in biomechanics. Transduction: defined as the changing of energy from one form into another, examples are, fire heats up water, food provides atp for movement, solar panel, some energies is wasted and therefore is a cost to transduction. Translational kinetic energy: energy based on speed of movement, velocity doubles, energy quadruples. Rotational kinetic energy: energy based on speed of rotation, angular velocity doubles, energy quadruples. Gravitational potential energy: energy based on position or object configuration, mass and gravity are relatively constant, y is all important. Energy and biomechanics: energy relationships make it possible for us to understand the relationships between, applied forces, changes in speed, changes in height, deformation. Positive work: force did work on the body to increase its mechanical energy energy, force and displacement are in the same direction, concentric muscle contraction- shortening while contracting gained.
