NEWTON LAW OF MOTION

F=ma
Fn=mg + ma
Fk=uk + Fn

tension horizontal:
Fp - FT=ma

tension vertical:
FT - mg=ma

Physic 130-work and energy equation

W=FS cos ø
PE=mgh
KE=(1/2)mv^2
Wnc=(KEi + PEi) -(KEf + PEf)
Wnf=MEf+ MEi

for spring:
PE=(1/2)kx^2
KE=kx cos ø