A single object (air in a piston) or a group of objects (two colliding vehicles) that you're interested in. When a SYSTEM changes energy is transferred wither into or away from the SYSTEM, between different objects in the SYSTEM or energy stores
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How is enegry transferred by HEATING ?
Water (system) the kettles heating element transfers energy to the water into the waters thermal energy store (2 object system water and heating element)
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What is WORK DONE ?
Another way of saying energy transferred, can be done when current flows (work is done against resistance ina circuit) or by a force moving an object.
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What is the equation for WORK DONE ?
WORK DONE= FORCE (N) x DISTANCE (M) / W=Fs
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What is KINETIC ENERGY ?
Anything that is moving has a KINETIC ENERGY store, enegry is transferred to this when the object speeds up, transferred away when it slows/stops
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What is the equation for KINETIC ENERGY ?
KINETIC ENERGY (J) = 1/2 x MASS (kg) x SPEED (m/s) / E = 1/2mv
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What is GRAVITATIONAL POTENTIAL ENERGY ?
When lifting an object in a gravitational field work is required, this causes energy transfer to the G.P.E store of the object, the amounbt deoends on its MASS, HEIGHT, STRENGTH of the GF
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What is the equation for GPE ?
GPE (J) = MASS (kg) x GFS (N/kg) x HEIGHT (m) / E = MGH
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What is ELASTIC POTENTIAL ENERGY ?
Stetching or squashing and object can transfer energy to EPE store, as long as the limit of proportionality has not been exceeded it can be found using the equation.
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What is the equation for ELASTIC POTENTIAL ENERGY ?
ELASTIC POTENTIAL ENERGY (J) = 1/2 x SPRING CONSTANT (N/m) x EXTENSION (m) / E = 1/2ke
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Other cards in this set
Card 2
Front
What is a SYSTEM ?
Back
A single object (air in a piston) or a group of objects (two colliding vehicles) that you're interested in. When a SYSTEM changes energy is transferred wither into or away from the SYSTEM, between different objects in the SYSTEM or energy stores
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