KEY TAKEAWAYS •
Work is in the same units of energy and reflect a change in energy of a system in joules.
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Work is the amount of energy that goes over a specific displacement and may not be the total amount of force applied.
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The cosine of theta is the angle between the force applied and the direction of work.
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Work will be a combination of the change in kinetic energy and potential energy if only conservative forces are involved.
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There are conservative forces and nonconservative forces; the nonconservative forces will change the mechanical work of the system but this is not the case with conservative forces.
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Power is the work done over a specific period of time; this is measured in watts (which is the SI unit) or in horsepower.
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