Friction conditions on contact point of disc

In summary, the friction force at the contact point between a rotating disc and a fixed surface will be a combination of rolling and sliding friction, with the direction depending on the relative velocities of the two surfaces.
  • #1
mavk
1
0
Hello,

I have some doubts regarding the friction force on a certain situation. Imagine a disc over a fixed flat surface. Like this:
Rolling1-appr29-8-11.jpg

The disc has two motions, rotational and translational but these are independent of each other. I mean the translational motion does not come from the rotation of the disc, imagine an external force that moves the disc.

Now, with this in mind let's say that the disc is moving from left to right always keeping contact with the surface. At the same time the disc is rotating with an angular velocity clockwise. Because of the different movements, at the contact point, there is slip.

Now to the question itself. What kind of friction do I have at the contact point? Do I have rolling or sliding friction at the contact point? and what direction does the friction force have since the disc is moving to the right but at the contact point the direction of rotation is to the left?

Thank you.
 
Physics news on Phys.org
  • #2
The friction force at the contact point would be a combination of rolling and sliding friction. The magnitude and direction of the friction force will depend on the relative velocity between the two surfaces. If the disc is moving faster than the rotation, then the friction force will point in the same direction as the translational motion. If the rotation is faster than the disc's motion, then the friction will point in the opposite direction.
 

FAQ: Friction conditions on contact point of disc

1. What is friction and why is it important in the contact point of a disc?

Friction is a force that occurs when two surfaces are in contact and moving relative to each other. It is important in the contact point of a disc because it determines the amount of resistance or grip between the disc and the surface it is in contact with, which affects its movement and performance.

2. How do friction conditions affect the flight of a disc?

The friction conditions on the contact point of a disc can greatly impact its flight. High friction can cause the disc to slow down and have a shorter flight, while low friction can result in a faster and longer flight. The direction and magnitude of the friction force can also affect the disc's stability and trajectory.

3. What factors influence the friction conditions on the contact point of a disc?

The friction conditions on the contact point of a disc can be influenced by several factors, including the surface texture and type, the weight and material of the disc, and the speed and force of the throw. Environmental factors such as temperature and humidity can also play a role.

4. How can friction be manipulated to improve disc performance?

Friction can be manipulated through the use of different materials and surface treatments. For example, adding grip tape or powder to the disc's contact point can increase friction and improve grip. Adjusting the speed and force of the throw can also impact the amount of friction on the disc.

5. How does friction on the contact point of a disc affect the player's technique?

The amount of friction on the contact point of a disc can affect the player's technique in terms of grip and release. Higher friction can require a stronger grip and a more powerful release, while lower friction may require a looser grip and a gentler release. It is important for players to be aware of the friction conditions and adjust their technique accordingly for optimal performance.

Similar threads

Replies
41
Views
5K
Replies
4
Views
756
Replies
4
Views
2K
Replies
3
Views
4K
Replies
7
Views
3K
Replies
11
Views
1K
Replies
3
Views
1K
Replies
241
Views
11K
Back
Top