Work_and_Energy_Principles

# Work_and_Energy_Principles - Work and Energy Principles...

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Work and Energy Principles Problems Definition of the Work done on an object by a given force, given the force F , the displacement vector d , and the angle between them θ . mgh PE g = Definition of the Gravitational Potential Energy of an object, given the mass of the object, the acceleration due to gravity, and the height above some chosen reference point where the potential energy is set to zero . 2 2 1 kx PE s = Definition of the Spring Potential Energy of a spring, given the spring constant k and the amount of displacement done stretching or compressing the spring x . 2 2 1 mv KE = Definition of the Kinetic Energy of an object , given the mass of an object m , and the speed of the object v . Work-Energy Principle - Employed to calculate the motion of an object when there is no change in the potential energy ( PE ) of a moving object. PE KE W NC + = General Work-Energy Principle - Employed to calculate motion for a moving object when there is a change in the potential energy ( PE ) of an object and friction is doing work on it ( NC W ). 0 = + PE

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## This note was uploaded on 11/07/2011 for the course PHYS 2325 taught by Professor Garcia during the Spring '10 term at University of Houston - Downtown.

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Work_and_Energy_Principles - Work and Energy Principles...

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