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Definition
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Definition
A unit of work measured in Newton-Meters |
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Definition
a = V2 squared - V1 squared; all over 2d |
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Equation of Kinetic Energy |
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Definition
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Equation for the Work-energy Principle |
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Definition
Wnet = .5(m)(v2)^2 - .5(m)(v1)^2 Wnet = KE2 - KE1 Wnet = change of KE |
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Equation for the Gravitation of Potential Energy |
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Definition
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Equation for the elastic potential energy |
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Definition
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Definition
v1 = square root of (2KE1/m) |
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Definition
E = KE + PE = .5mv2 + mgy |
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Definition
the product of the magnitude of the displacement times the component of the force parallel to the displacement |
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Definition of Kinetic Energy |
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Definition
The energy of motion from the Greek word "kinetikos" meaning motion |
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Definition of work-energy principle |
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Definition
the net work done on an object is equal to the change in its kinetic energy |
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Definition of potential energy |
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Definition
the energy associated with forces that depend on the position or configuration of a body (or bodies) and the surroundings |
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Definition of gravitational potential energy |
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Definition
the rpduct of its weight mf and its height y above some reference level |
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Definition of "restoring forces," Hooke's Law, spring equation |
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Definition
the spring exerts its force in the direction opposite the displacement (hence the minus sign), acting to return it to its nomal length |
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Definition of Conservative forces |
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Definition
forces such as gravity, for which the work done does not depend on the path taken but only on the initial and final positions. |
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Example for nonconservative forces |
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Definition
ex.: friction, air resistance, tension in cord, motor, rocket propulsion, push or pull by person |
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definition of total mechanical energy |
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Definition
the sum of the kinetic and potential energies at any moment |
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definition of the principle of conservation of mechanical energy |
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Definition
if only conservative forces are acting, the total mechanical energy of a system neither increases nor decreases in any process it stays constant it is conserved |
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definition of the law of conservation of energy |
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Definition
the total energy is neither increase nor decreased in any process. Energy can be transformed from one form to another, and transferred from one body to another, but the total amount remains constant. |
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Definition of Dissipative forces |
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Definition
frictional forces reduce the total mechanical energy |
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Definition of thermal energy |
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heat is considered as energy |
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Definition
the rate at which work is done OR as the rate at which energy is transformed |
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Definition
in SI units, power is measured in joules per seconds |
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Definition
one horsepower is defined as 550 ft*lb/s which equals 746 W |
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Definition
this can be defined as the ability to do work |
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Definition
it stands for the spring constant |
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If the Gravitational potential energy is without WFfr what type of path is it? |
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Definition
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If the Gravitational potential energy is with WFfr what type of path is it? |
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Definition
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Mechanical energy includes what? |
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Definition
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The large Gravitational Potential Energy Equation |
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Definition
.5m(velocity 1 squared) + mg(y1) + .5k(x2 squared) = .5m(v2 squared) mg(y2) + .5k(x2 squared) + (Ffr)(d) |
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