ENERGY Flashcards
what are the 6 energy stores
kinetic, nuclear,chemical,elastic,gravitational potential,internal
what are the 4 ways of energy transfer
mechanically, waves , heating , electrically
what is energy store
can store in body
what is energy transfer
transfer thru a force
energy definition
is required for things to work
si unit for energy
joule (J)
energy in kinetic store formula (Ek)
Ek = 1/2 mv^2
energy in gravitational potential store formula (Ep)
Ep = mgh
What is the principle of conservation of energy (3)
-energy cant be created/destroyed
- can be transferred from one store to another
- energy of an isolated system remains constant
work done definition
is the product of the force and distance moved
work done formula
W=Fd
power definition
defined as the work done or energy transferred per unit time
si unit of power
Watt (W)
Power formula
P = W/t = E/t
