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EA Physics Unit 6

Work & Energy

TermDefinition
work A quantity defined as a force multiplied by the displacement over which that force is applied. This quantity also results in a change in energy.
negative work Occurs when a force acts in the opposite direction of the displacement of an object, resulting in a decrease in energy.
positive work Occurs when a force acts in the same direction as the displacement of an object, resulting in an increase in energy.
joule The unit for work and energy
power The rate at which work is done (the rate at which energy is transformed)
watt The unit for power
energy The ability of an object to produce a change in itself or the world around it. The ability to do work.
kinetic energy The energy of an object that is due to the object's motion
work-energy theorem Says that the work done to an object is equal to the object's change in total energy
potential energy The energy associated with an object because of the position, shape, or condition of the object.
gravitational potential energy The potential energy of an object due to its position in a gravitational field
elastic Ability for material to bounce back after being disturbed
elastic potential energy The energy available for use when a deformed stretchy object returns to its original configuration.
spring constant A quantity that is a measure of an elastic object's resistance to being compressed or stretched.
law of conservation of energy In a closed, isolated system, energy can neither be created nor destroyed; rather, energy is conserved.
closed system A system in which the mass doesn't change (no matter is allowed to enter or leave)
isolated system A system on which the net external force is zero and no energy is lost to the outside of the system.
mechanical energy The sum total of potential and kinetic energy
internal energy The energy associated with the motion of molecules inside an object, which is typically observed as heat. Symbol: Q
Created by: ehansen_eak12
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