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Subject: 
Physics
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Tags: 
Physics
Introductory physics
Forms of energy
Classical mechanics
Mechanics
Physical quantities
Potential Energy
Kinetic Energy
energy
Work
Mechanical Energy
Force

ENERGY Lecture Notes 1 WORK AND ENERGY 1. Work (W,A): Work = Parallel Force x Displacement sFW parallel = Note 1: Work is a scalar quantity. It does not have direction. Note 2: We can use the formula above only if the force is constant along the distance. 1J = 107 erg Therefore: 1J = 1 N m. Ex: Find the work done by the force. Ex: Find the work done by the man on the weights as he holds the them at fixed position for two hours. [The man is consuming energy but this energy is not transferred to the weights.] Ex: WF= Fperpend s WF = (F Cos?) s (General formula) Attention: The component perpendicular to the displacement does not do work. Ex: Find the work done on the object (by

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