2007-02-25 03:50:17 · 8 answers · asked by A 1 in Science & Mathematics ➔ Physics
No necessary, depends on what you are talking about...
2007-02-25 03:57:12 · answer #1 · answered by Brian 3 · 0⤊ 0⤋
Friction can be bad.
As friction creates heat, if unintended friction is present in any mechanism, then the operating temperature of the part of the mechanism which is experiencing friction can rise to unacceptable levels.
Also as Heat = Work, then any mechanism, which has unintended friction, is wasting part of its input energy in creating heat, rather than doing the job it is supposed to be doing. Hence its operating efficiency will be lower than if friction could be eliminated.
Friction can be good.
Car, truck, and bicycle brakes are devices designed to create friction (but are also designed to dissipate the heat generated by the friction). The friction is created between the stationary brake pads and the rotating metal brake disc or brake drum, or wheel rim (in the case of most bicycles).
2007-02-25 04:41:30 · answer #2 · answered by Valmiki 4 · 0⤊ 0⤋
Friction stops us falling over. If we sneezed and there replaced into no friction we would be propelled in the choice path of the sneeze. Friction facilitates vehicles to brake. Friction would positioned on out a motor vehicle engine in minutes without using oil to decrease the friction. there are various examples so have a splash think of approximately what others there are. in short friction has advantages to us and in different cases it fairly is undesirable.
2016-12-14 05:22:16 · answer #3 · answered by keetan 4 · 0⤊ 0⤋
Somtimes a little friction is quite nice.
2007-02-25 05:25:53 · answer #4 · answered by Vulture38 6 · 0⤊ 0⤋
Sometimes friction is essential. We couldn't walk if our feet kept sliding against the ground, could we.
2007-02-25 03:59:32 · answer #5 · answered by checkmate 6 · 0⤊ 0⤋
If you'd ever been dragged along a nylon carpet naked you wouldn't ask this question!
2007-02-25 04:00:08 · answer #6 · answered by soapy 2 · 0⤊ 0⤋
Because its heat related.
2007-02-27 05:49:27 · answer #7 · answered by CLIVE C 3 · 0⤊ 0⤋
cos it wears and tears materials
2007-02-25 11:55:24 · answer #8 · answered by George 3 · 0⤊ 0⤋