vocab
the ability to do work or cause change
what is energy?
energy stored in food
what is chemical energy?
a rolling ball has this type of energy
what is kinetic energy?
natural gas heating water
what is chemical --> thermal?
unit of energy
joules
the rate at which energy is transferred
what is power?
energy from heat
what is thermal energy?
a book on a shelf has this type of energy
what is potential energy?
a waterfall
potential --> kinetic
formulas for potential energy
PE = force x height
energy of motion
what is kinetic energy?
energy of moving parts
what is mechanical energy
a stretched rubber band has this type
what is elastic potential energy?
your body using food to move
chemical --> mechanical
if mass increases, kinetic energy ....
increases
stored energy due to position
what is potential energy?
energy stored in the nucleus
what is nuclear energy?
a thrown football has both types -- name them
kinetic and potential
friction slowing an object
mechanical --> thermal
20N lifted 0.5 m =
10 J
energy cannot be created or destroyed
what is the law of conservation of energy?
energy carried by light
what is electromagnetic energy?
what is mechanical energy?
a roller coaster going up a hill
kinetic --> potential
height needed: 25 N to equal 10 J
0.4 m