What value would one measure friction using?
How do i work out this value in an experiment.
What graph would be most suitable to compare the friction of different substances?
2007-06-09 20:23:49 · 5 answers · asked by Rahhot 2 in Science & Mathematics ➔ Physics
im not quite clear with the question you're asking, but some info on friction:
You can say friction is a force, so in metric system units it would be measured in (N) Newtons.
F = uN
F = force
u = coeficient of friction
N = normal force (perpedicular to a surface) = weight
2007-06-09 20:29:24 · answer #1 · answered by driftaddict87 4 · 0⤊ 0⤋
Friction of two materials is measured on an inclined plane.
If you are trying to measure the frictional coefficient of say cork to steel, you take a cork block and place it on a steel ramp. Lift the ramp steeper and steeper until the cork block breaks free and slides down the ramp.
Measure the angle of the ramp and the angles tangent is the static frictional coeficient.
There is a second frictional coefficient, the dynamic frictional coefficient.
This is going to be found on a less steep of an incline. Give the block a nudge and if the block slides down the ramp at a constant speed, you have found the angle. If the blocks speeds up, lower the ramp slightly and nudge again. If the block stops, raise the ramp a little.
The tangent of the constant speed angle will be the dynamic frictional coefficient.
2007-06-10 04:04:58 · answer #2 · answered by Holden 5 · 0⤊ 0⤋
Friction is an opposing force that's set in when two material bodies are in relative motion or just about to begin relative motion. Its of two types-
1.)static and
2.)dynamic.
Static friction in simple terms is due to the elecrostatic force of attraction between the atoms of the 2 bodies. The force that is required to just set the 2 bodies in relative motion [mind it not actually in motion, just about to begin motion] is the measure of friction that exists between them.
Dynamic friction, on the other hand, is the force required to keep the 2 bodies in relative motion.
Thus it is clear that the friction is measured in terms of force hence its units are newton ( N ) [ in honour of Physicist, Isaac Newton.]
2007-06-10 03:51:07 · answer #3 · answered by Ξlectronegative™дtif® 2 · 0⤊ 0⤋
Friction is a force. So units will be that of force.
Comparing different substances would be by comparing their coefficients of static and dynamic friction.
2007-06-10 03:30:01 · answer #4 · answered by Swamy 7 · 0⤊ 0⤋
force is measured in newtons(a unit of force).
2007-06-10 05:16:07 · answer #5 · answered by Dr. Eddie 6 · 0⤊ 0⤋