Calculating Friction Force on a Rotating Disk

In summary, the conversation is about understanding the friction force module at a given frequency. The solution involves using the equation F = ma to find the friction force, and the conversation ends with a question about the acceleration at a specific angular frequency.
  • #1
5Mystery
1
0

Homework Statement



The thing that is lying on the disk(Disko), is rotating together with disko. After the rotary frequency of disko grew twice (N X 2), friction(rubbing) Force grew F=6 ( F + 6). You have to understand friction Force module at the original frequency.


Homework Equations



I don't know. Probably, 2N = F + 6 : m X g

The Attempt at a Solution



2N = F6 : mg = F6 : 9,8
F = 9,8 : 6

but I don't think it is correct please help me. Sorry if there are some mistakes but I really need it please do not delete this post.
Thank you very much. :)
 
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  • #2
Welcome to PF!

Hi 5Mystery! Welcome to PF! :smile:

The only horizontal force is the friction (and the only motion is horizontal).

So you can find the friction, F, by using F = ma.

So what is the acceleration (a), at an angular frequency ω? :wink:
 

FAQ: Calculating Friction Force on a Rotating Disk

What is friction on a rotating disk?

Friction on a rotating disk is the resistance or force that opposes the motion of the disk as it rotates.

What causes friction on a rotating disk?

Friction on a rotating disk is caused by the interaction between the surfaces of the disk and the surrounding air or another object that it is in contact with.

How does the speed of rotation affect friction on a rotating disk?

The speed of rotation has a direct impact on the amount of friction experienced by a rotating disk. As the speed increases, so does the amount of friction.

How does the shape of the disk affect friction?

The shape of the disk can greatly affect the amount of friction experienced. A disk with a larger surface area will have more friction compared to a disk with a smaller surface area.

Can friction on a rotating disk be reduced or eliminated?

Friction on a rotating disk can be reduced by using lubricants on the disk or surrounding surfaces. It can also be eliminated by reducing the air resistance or using a different material for the disk that has a lower coefficient of friction.

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