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Flashcards: Physics (ENERGY) in book
Chemical store
In food, fuel or batteries
Kinetic store
in a moving object
Gravitational store
more in an object lifted above its planet
Elastic store
In a stretched, squashed or twisted object
Thermal store
In an object at high temperature
Magnetic store
In magnetic forces between magnetic poles
Electrostatic
In electrical forces between charges
Nuclear
In the immensely strong forces in atomic nuclei
Work - definition
Work can be defined as transfer of energy from one store to another. Applying a force to an object changes the energy store.
Work - equation
W = f x d w/d = f W= (J) F= (N) d = (m)
Power - definition
- Power is defined as the rate at which energy is transferred, or the rate at which work is done.
Power - equation
Power = energy transferred/ time P = E/t Power = work done?time P = W/t