PHYS 101 Lecture Notes - Lecture 15: Conservative Force
13 Jul 2015
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Phys 101: physics for the life sciences lecture 15: Consider an object and an amount of work w is done on it by a force in some time interval t. The average power delivered by the force is pavg= w. =f v =f xv x+f yv y=fvcos . An elevator of mass 1000 kg should carry a load of 800 kg. (2. 34 104) v max (pick a max speed and plug it into the equation) Minus the work done by a conservative force. Is equal to the change in potential energy. W e= u=u i u f (where u = potential energy) Consider an object subject only to conservative forces. In energy problems we define a system (a system of objects e. g. crate, a crate and the. E. g consider lifting a rate at constant speed: when you consider the system as the crate only then there are two forces outside the system doing work on the system(crate)
