Weight(newtons)=massXgravity
KE(joules)=.5XmassX(velocityXvelocity)
GPE(joules)=height(m)X9.8(gravity)
Power(watts)=work/time
Force(newtons)=massXgravity
Work(newton meters)=forceXdistance
Elastic Force(joules)=how much strectched X elastic constant
EPE(joules)=.5 X how much streched X (elastic constant X elastic constant)