Work: The transfer of Energy
Energy: The ability (capacity) to do Work.
Work and Energy are measured in Joules.
Energy can be stored as Potential Energy (EP). When Potential Energy is released, it causes motion so the energy to transformed to Kinetic Energy (EK).
In Science, there are many conservation laws. In this unit, we study the Law of Conservation of Energy. It states that energy cannot be created or destroyed; it simply changes form.
This law permits us to evaluate energy situations based on the total Mechanical Energy of a system as the sum of the potential and kinetic energies.
Energy: The ability (capacity) to do Work.
Work and Energy are measured in Joules.
Energy can be stored as Potential Energy (EP). When Potential Energy is released, it causes motion so the energy to transformed to Kinetic Energy (EK).
In Science, there are many conservation laws. In this unit, we study the Law of Conservation of Energy. It states that energy cannot be created or destroyed; it simply changes form.
This law permits us to evaluate energy situations based on the total Mechanical Energy of a system as the sum of the potential and kinetic energies.
Total Mechanical Energy is the sum of the potential and kinetic energies in a closed system.
The abbreviations above are:
EK is Kinetic energy; this is energy due to motion.
EDISS is dissipated energy; this is energy that transforms to a type that is not recoverable or does not serve the purpose of the system.
EGRAV is Gravitational Potential Energy; this is energy that a mass possesses due to its position in a gravitational field.
EEL is Elastic Potential Energy; this is energy stored in a spring (or anything that deforms or changes shape).
A closed system is a system that is defined by the observer and that system does not permit energies to flow into or out of the system.
EK is Kinetic energy; this is energy due to motion.
EDISS is dissipated energy; this is energy that transforms to a type that is not recoverable or does not serve the purpose of the system.
EGRAV is Gravitational Potential Energy; this is energy that a mass possesses due to its position in a gravitational field.
EEL is Elastic Potential Energy; this is energy stored in a spring (or anything that deforms or changes shape).
A closed system is a system that is defined by the observer and that system does not permit energies to flow into or out of the system.
START NOTES:
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IN CLASS PRACTICE:
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HOMEWORK:
Refer to this if you need help setting up the problems:
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Click below to download a KEY to review your work on
SET 1 of 2.
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On the next practice, you will use the Law of Conservation of Energy to find a missing value. Remember . . . in a closed system, TOTAL MECHANICAL ENERGY is conserved.
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Key for Set 2 of 2 Practice
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Our course will be limited to the study of these energy types.