If I have a block that weighs 1 kg and a block that weighs 0.1kg, would the coefficient of static friction (max) change for the two?
2006-10-23 15:49:34 · 6 answers · asked by leikevy 5 in Science & Mathematics ➔ Physics
I would think not because on a angle (theta),
Friction force = Mu times Normal Force
cos theta times MG = MU times sin theta
and the M (mass) cancels out.
Is my reasoning wrong?
2006-10-23 15:58:53 · update #1
Mu MG sin theta, correction
2006-10-23 15:59:54 · update #2
mass has no effect...F(friction force) = coefficient of friction * (mass) * acceleration....the coefficient of friction is unitless...
2006-10-23 15:56:47 · answer #1 · answered by pokerden1 2 · 0⤊ 0⤋
what you must understand is that friction is not a constant force. yes yes it is not a constant force as all beleive. especially static friction. to understand more if you have a heavy huge table and you push it a little bit (not trying hard....) it will not move due to friction. the magnitude of the friction will equal the force applied.
then you push it harder. still it doesnoit move due to static friction. the magnitude now equals the new force larger than the previous one. so the friction has changed magnitude.
the maximum value is the moment that static friction "breaks" and then we go to the CONSTANT sliding friction situation.
now the coefficient remains the same there is no doubt. but mass since it is present as a part of the normal force plays a significant role regarding the magnitude of friction.
from the equation Friction = coeff. * Normal force
and normal force = m g sin(theta)
so Fr. = coeff. *m*g* sin (theta)
so if m is larger then friction is larger
2006-10-23 18:48:31 · answer #2 · answered by Emmanuel P 3 · 0⤊ 0⤋
No. The coefficient of friction is a constant multiplied by mass to get the friction force. So they are independent of each other.
2016-03-28 05:40:52 · answer #3 · answered by Anonymous · 0⤊ 0⤋
The coefficient of static friction is a unitless property of the surface. It is unaffected by the mass. The total friction force on the other hand is dependant on the mass.
2006-10-23 18:41:42 · answer #4 · answered by Anonymous · 0⤊ 0⤋
The coefficient of friction does not change, but the actual frictional force will be different. The frictional force is µ*m*g, where µ is the coeffictient of friction, m = mass, g= accel of gravity.
2006-10-23 15:55:58 · answer #5 · answered by gp4rts 7 · 0⤊ 0⤋
Generally, the mass should not play a huge factor when the weights are similar; however, one can not predict what would happen with different materials.
2006-10-23 15:56:53 · answer #6 · answered by bruinfan 7 · 0⤊ 1⤋