I'm just curious, as, although it has usually been maintained in A-level mechanics that μ≤1, it seems intuitive that some materials would require a greater applied horizontal force than the normal reaction force to induce movement. So, can μ>1 ever be true?
Put a shoe (with some tread) on the pavement, and it's going to be easier to lift it than push it along. The example I gave is simply so people can relate. Anyway, care to elaborate on 'internal/external forces'?
I guess I'm wrong but I figured at the time it was because the coeffecient of friction had to be a ratio to make sure energy is conserved. I guess in general F = uR so if u > 1 then the frictional force is greater than the normal reaction force, which seems pretty possible really. And I guess conservation of energy isn't really related. I probably wasn't as interested back in M1 or M2 when it was introduced.
It´s nowhere near as cool, however, as having a coefficient of restitution which is greater than one.
From Wikipedia: "A COR greater than one is theoretically possible, representing a collision that generates kinetic energy, such as land mines being thrown together and exploding."
It´s nowhere near as cool, however, as having a coefficient of restitution which is greater than one.
From Wikipedia: "A COR greater than one is theoretically possible, representing a collision that generates kinetic energy, such as land mines being thrown together and exploding."
It´s nowhere near as cool, however, as having a coefficient of restitution which is greater than one.
From Wikipedia: "A COR greater than one is theoretically possible, representing a collision that generates kinetic energy, such as land mines being thrown together and exploding."
Now I have a reason to go back to my college to poke my maths teacher for saying it was always < 1 ...
It´s nowhere near as cool, however, as having a coefficient of restitution which is greater than one.
From Wikipedia: "A COR greater than one is theoretically possible, representing a collision that generates kinetic energy, such as land mines being thrown together and exploding."
Lol that's a silly question...In general the coefficient of friction is less than one. For a heavily polished surface the frictional force increases due to the increase of inter atomic forces. In such a case coefficient of friction will be greater than one.Next time when you are asking a question just think about it once . I have already wasted 1:45 sec typing this already. See ya