ENERGY-stores+transfers

all about kinetic energy

-energy stored in a moving object

-ek=0.5xmassxspeed squared

mass in kg

speed in m/s

-always use kg in physics for mass!

all about elastic potential energy

-energy stored in a stretched spring

-ep=0.5 x K x e squared

k=spring constant(n/m)

e=extension(m)

extension is DP to the force

-if too much force is applied, spring will get stretched beyond limit of proportinality and will not return back to its original shape

all about gravitational potential energy

-energy stored in an object due to its position above the earths surface due to a force of gravity acting on an object

Ep=m x g x h

-mass(kg)

-gravitational field strength(n/kg)

-height(m)

name all energy stores

-kinetic

-gravitational potential

-elastic potential

-thermal

-chemical

-magnetic

-electrostatic

-nuclear

energy transfers

work done(mechanical)-applying a push or pull force

heating-transfer by conduction, convection or radiation

radiation-energy travels as waves

electrical-movement of charge

all about specific heat capacity

-the amount of energy required to raise the temperature of 1kg of a substance by 1 degrees

change in thermal energy(J)=m(kg) x c(J/kg celscius) x temp change(degrees)

c=specific heat capacity