PHYSICS 5A Lecture Notes - Lecture 19: Inelastic Collision, Elastic Collision, Headon
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Physics 5a _ lecture 19 _ thermal energy and collisions. Thermal energy is kinetic energy (associated with microscope motion of atoms/molecules. ) One way to transfer energy to thermal energy is via kinetic friction (not static friction. Example: imagine moving a book along a table at constant velocity for a distance d; book starts at rest and ends at rest. This means that k i = k f = 0. For an isolated system, no work can be done on the system or by the system. Isolated system, no friction (where mechanical energy is conserved) Note that it is important to carefully define your system. Choosing an isolated system (these are from the textbook section 10. 1) We choose the ball and the earth as the system, so that the forces between them are internal forces. There are no external forces to do work, meaning that the system is isolated. An object sliding down a frictionless ramp.
