From tectonic plates Down to tiny gears Where meet surfaces A new force appears Friction is the name It fights motion’s flow When moving obb-jects touch Causes them to slow For roughness and attraction At scales molecular Turn kinetic energy Into temperature [Break] But Friction also acts On things sitting still Gripping them in place To such point until [Break] The outside force exceeds Inside force pushing back It’s called Static Friction Matches forces to some max [Break] For things already on the move We have Kinetic Friction Weaker than the Static type Need less outside force to fight [Break] So easier it is To keep something moving Than to make the process start Settled stuff has bonds to part [Break] From tectonic plates Down to tiny gears Where meet surfaces A new force appears Friction is the name It fights motion’s flow When moving obb-jects touch Causes them to slow For roughness and attraction At scales molecular Turn kinetic energy Into temperature [Break] Friction has great uses And can be a nuisance That for same will come and go First as friend, then to foe: [Break] Shoe treads give feet grip So that we don’t slip But in time treads wear down As we walk around [Break] Brake pads stop cars fast Help us to not crash But heat damage they create So in time must be replaced [Break] For heat and hold can be the goal Say, rubbing hands in the cold But will skin burn or rip When to ground we trip [Break] Thankfully, there are ways To reduce it or else raise Friction, as our needs may be First let’s make things slippery [Break] Like the chain of a bike That goes ‘round metal cogs Just add a little oil or grease And friction easily decrease [Break] So with feet, when we push down Chain glides - not grinds - over teeth From low viscous boundary That coats the parts beneath [Break] So too we can change Sliding friction stronger To the weaker rolling sort That makes wheels spin longer [Break] With spin of tiny ball bearings This conversion we induce Between a wheel and axle, say And friction thus much reduce [Break] From tectonic plates Down to tiny gears Where meet surfaces A new force appears Friction is the name It fights motion’s flow When moving obb-jects touch Causes them to slow For roughness and attraction At scales molecular Turn kinetic energy Into temperature [Break] Lastly, friction from Moving through fluids, air Is called Drag, commonly And get stronger in degree [Break] As the speed increases Think when swimmers race But can be reduced if they Take a more streamlined shape [Break] For in shorter time Something speedier Will collide with particles In greater number, harder [Break] But stuff longer, pointier Will part fluids gently And guide them to its back A trick that blunt things lack [Break] Drag though has its uses, like When we want to slow things down Think how parachutes catch air Safely bringing much to ground [Break] From tectonic plates Down to tiny gears Where meet surfaces A new force appears Friction is the name It fights motion’s flow When moving obb-jects touch Causes them to slow For roughness and attraction At scales molecular Turn kinetic energy Into temperature
