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science ch. 9

STUDY
PLAY
work
when a force is done on an object
joule
what is the unit for work
1 Newton meter
what is a joule equal to
power
the rate at which work is done
P=w over t
what is formula for power (spell it out)
watt
what is unit for power
potential energy, kinetic energy
what are the two forms of mechanical energy
potential energy
stored energy in an object that is held in readiness
elastic potential energy, chemical energy, gravitational energy
what are the three types of potential energy
PE=Fd
what is the formula for potential energy
kinetic energy
energy in motion
1 half mv squared
what is the formula for kinetic energy
w=change KE
what does the work energy theorem state
energy cannot be created or destroyed
what does the law of conservation of energy state
TE=PE+KE
was is the formula for total energy
photosynthesis
what is the process for plants to create energy
sun
what is the main source of all energy
nuclear and geothermal energy
what are energy sources that are not the sun (2)