2007-05-01 09:32:05 · 5 answers · asked by Peggy C 1 in Science & Mathematics ➔ Physics
Because energy used to propel the object forward is getting turned into heat. (Try rubbing your hands together quickly - they get warm.)
2007-05-01 09:36:33 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Friction *does* cause objects to speed up.....
A racecar, for example, would *never* get past the starting line, without friction between the road and the tires.
However, In the absense of any additional source of Energy, like a running engine, friction *will* eventually bring the car to a stop.
This is due the principle of conservation of energy, and the second law of thermodynamics. Friction causes the car to lose kinetic energy, by converting motion into heat. In order for energy to be conserved, the car *must* slow down.
If friction were to cause an object to spontaneously speed up, without some sort of external input, conservation of energy says that the object and it's surroundings would have to *cool down.* But the laws of thermodynamics say that this is *impossible!* The conversion of motion into heat by friction is not a "reversible" process; just like breaking glass, or mixing dye or salt into water, are not reversible. Once such processes occur, they have no way of returning to their original state, at least not by themselves.
Hope that makes sense...
~Soylent Yellow
2007-05-01 10:06:25 · answer #2 · answered by WOMBAT, Manliness Expert 7 · 1⤊ 0⤋
There is one time that friction does speed up an object. When a man and woman are trying to conceive, the more friction the guy experiences, the faster he goes.
2007-05-01 09:46:03 · answer #3 · answered by Bill 3 · 1⤊ 0⤋
"Friction is the stress resisting the relative lateral (tangential) action of good surfaces, fluid layers, or fabric aspects in touch" -- WIKIPEDIA RESISTING the TANGENTIAL action! potential it somewhat works against despite stress is pushing an merchandise or otherwise offering acceleration. So the quantity of acceleration is decreased, and an merchandise would be going slower than without friction. subsequently, friction SLOWS down products. what's with this bullshit approximately friction dashing up products from time to time, which contain a treadmill or with traction? enable's say vehicle traction. You push down on the gas, you pass. How? Tires stayed in touch with the line by using friction. Did friction velocity up the vehicle? No, the engine did. decide for to be certain friction decelerate your vehicle? Pop it into impartial, disconnecting the engine, and watch your speedometer. If friction hurries up a vehicle, it could be going somewhat quickly quickly. OH, wait, it slows down. Dang, must be air resistance then, precise? by using fact friction hurries up autos, and slows down each thing else in accordance to those nutjobs. So friction in basic terms must be weaker than air resistance, so which you decelerate. Gotcha. /sarcasm contained with regards to an merchandise thrown onto a treadmill, its the treadmill itself dashing up the article. The friction stress can in basic terms adhere the article to the exterior in this technique. in certainty, if the friction can not adhere then the article gets thrown off. and you know what? it will be going swifter by potential of being thrown off than if it adhered and fell off the top of the treadmill. So it is going swifter without friction (flying by air) than with friction. So whilst a result, friction SLOWS issues down.
2016-12-28 06:45:16 · answer #4 · answered by palo 3 · 0⤊ 0⤋
It does, the more friction between the road and your tyres the faster you go.
2007-05-01 09:41:00 · answer #5 · answered by Anonymous · 2⤊ 1⤋