friction

there's this one interesting thing

that truly helps us all get moving

we walk we run we jog and we jump

if not for friction we'd slip and slump

oh, how would ever the wheels roll

if not for this simple toll

for contacts between two surfaces

solid with solid, liquid or gases

caused by imperfections - the tiny projections

a surface's rejection of most deft attention

characterized by a co-efficient

i tell you it is proficient

exerting itself against the move

changing nature as behooves

static, sliding, rolling or fluid

adjusts itself as force ensues

though the max it can posit 

is a force opposite

the direction of motion 

with the simple expression

the coefficient's multiplication

with the surface's reaction

in the perpendicular direction

and never more than applied action

boy, what an interesting scheme

in motion the decay gleams

its me its me the friction screams

the boon the bane - co-existing extremes.