CHEM 1R03 Lecture Notes - Lecture 12: Elastic Energy, Net Force, Medicine Ball
28 Nov 2017
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From grade 11 : push a book half way across your desk, push a book all the way across your desk, put a book on top of your book, push them half way across you desk. W=f* d: push on a wall = 0 work, with one quick push give the single book more energy than (a) but less than (b) Talk through sample problems all of chapter 4. 4. 4 p"s and q"s as req"d p#1,2,4,6,10,12,14 q# 5,6. Overhead notes - hooke"s law and elastic potential energy. Spring exerts no net force on mass (equilibrium) Elastic potential energy - ee energy stored by the temporary deformation of an object. If spring is stretched or compressed the spring exerts a restoring force on the mass in the direction of equilibrium position. Hooke"s law the magnitude of the restoring force is directly proportional to the distance the spring has been stretched or compressed.
