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Work, Energy, and Power. Lesson 1 - Basic Terminology and Concepts; Definition and Mathematics of Work; Calculating the Amount of Work Done by Forces; Potential Energy; Kinetic Energy; Mechanical Energy; Power; Lesson 2 - The Work-Energy Relationship; Internal vs. External Forces; Analysis of Situations Involving External Forces
Review the units of work, energy, force, and distance. Use the equations for mechanical energy and work to show what is work and what is not. Make it clear why holding something off the ground or carrying something over a level surface is not work in the scientific sense.
So firstly, power is the rate at which energy is transferred or the rate at which work is done. Secondly, the first equation to calculate power is: power equals energy transferred, divided by...
Power is the rate of doing work or the rate of using energy, which are numerically the same. If you do 100 joules of work in one second (using 100 joules of energy), the power is 100 watts.
Energy is defined as the capacity to do work and comes in different forms: Gravitational potential energy - this is dependent on the object’s position in a gravitational field and its mass.
Revision notes on 5.1.1 Work & Energy for the CIE A Level Physics syllabus, written by the Physics experts at Save My Exams.
When you hear the word "work," what is the first thing you think of? Maybe sitting at a desk? Maybe plowing a field? Maybe working out?
