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F=uR

While doing questions on this, i was interested as to how this equation came about. Is there a proof?
Reply 1
Avatar for TeeEm
TeeEm
19
Original post by 123chem
While doing questions on this, i was interested as to how this equation came about. Is there a proof?


question on what exactly?
(never seen it before)
Original post by TeeEm
question on what exactly?
(never seen it before)


He's wondering how the equation F=uR came about I believe.
Reply 3
Avatar for 123chem
123chem
OP
17
Original post by TeeEm
question on what exactly?
(never seen it before)


F=uR, F is friction u is coefficient of friction, R is reaction force.
Reply 4
Avatar for TeeEm
TeeEm
19
Original post by PedanticStudent
He's wondering how the equation F=uR came about I believe.


What do these quantities represent?
Reply 5
Avatar for B_9710
B_9710
18
Original post by 123chem
While doing questions on this, i was interested as to how this equation came about. Is there a proof?


I suppose the coefficient of friction is found experimentally. If f is directly proportional to R then to just do the experiment a couple of times to get the constant - which is the coefficient of friction for that particular material tested.
Reply 6
Avatar for TeeEm
TeeEm
19
Original post by 123chem
F=uR, F is friction u is coefficient of friction, R is reaction force.


Purely experimental evidence
Reply 7
Avatar for Notnek
Notnek
21
Original post by 123chem
While doing questions on this, i was interested as to how this equation came about. Is there a proof?

Certain physical results are impossible to prove mathematically but are generated through observation and experiment.

Leonardo da Vinci was the first to state that if the the load of an object doubles, the friction doubles i.e. friction is proportional to normal reaction.
(edited 8 years ago)
Original post by notnek
Certain physical results are impossible to prove mathematically but are generated through observation and experiment.Leonardo da Vinci was the first to state that if the the load of an object doubles, the friction doubles i.e. friction is proportional to normal reaction.



yeeaaahdavinci.jpg
(edited 8 years ago)
Reply 9
Avatar for 123chem
123chem
OP
17
Fair enough, thanks all.

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