physics brrrr
types of energy stores
chemical, sound, gpe, thermal, kinetic, elastic
conservation if energy
energy cannot be created or destroyed
work
energy transfereed = work done
w= f×d
friction
= kinetic energy co verys to thermal bcs of friction
metiorite example frictoon
the energy transfers from gpe as it falls into atmosphere to kinetic to thermal as it starts heating up because of the friction against it caused by air resistance
brake pads example friction
energy trnasfers from kinetic because of vehicle moving to thermal becadue of the friction between brake pad and wheel discs
rub ur hands fricion emzpame
muscles in ur hand do work as u rub them togetehr vigoursly, work done trnasfers to kinetic enevery as ur hands are moving and kinetic enegry converts to thermal as ur hands rub against eachother
gpe
ep
ep=mgh (gpe of object)
ep= w×h (change of objects gpe)
ek
ek= .5mv²
m= ek÷.5v²
v²= ek÷.5m