Would the friction be in the plane?

In summary, the conversation discusses the concept of angular speed and torque in a system of two rotating disks. The speaker explains that due to friction, the disks will eventually rotate at the same rate, following the principle of angular momentum conservation. However, they clarify that while each disk may experience torque individually, there is no net torque on the system as a whole.
  • #1
Alem2000
117
0
If you had two disks with the lower one rotating and dropped the one on top onto it they both come to the same angular speed b/c of friction. How come there is no torqu action on it? Would the friction be in the plane?
 
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  • #2
What exactly do you mean when you say "there is no torque action on it?"

If there is friction then eventually the two disks will rotate at the same rate and it will do so in conformance with the principle of angular momentum conservations since there is no net torque on the system of disks. However, and obviously, each disk will experience torque.
 
  • #3
Okay what I don't understand is ...the conservation of angular momentum requres there to be no net torque...so are you saying that individually there is a torque but not on the system of the two disks?
 
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  • #4
That's exactly what I am saying! :-)
 

Related to Would the friction be in the plane?

1. What is friction in the plane?

Friction in the plane refers to the force that resists the motion of an object across a surface, such as the ground or a plane's wing. This force is caused by the microscopic irregularities on the surface that create resistance when two surfaces slide against each other.

2. How does friction affect an object in a plane?

Friction can affect an object in a plane in various ways. For example, it can slow down the movement of the plane by creating drag, which can reduce its speed and fuel efficiency. Friction can also cause wear and tear on the plane's components, such as the engine and wheels, and can affect the stability and control of the plane during takeoff and landing.

3. Can friction be reduced in a plane?

Yes, friction can be reduced in a plane through various methods such as using lubricants, polishing surfaces to make them smoother, and using materials with lower coefficients of friction. However, some amount of friction is necessary for the safe operation of a plane, as it helps with braking and maneuvering.

4. How is friction measured in a plane?

Friction in a plane is typically measured using a device called a tribometer, which measures the force required to move an object across a surface. The coefficient of friction, which is a dimensionless number, is used to quantify the amount of friction between two surfaces. It can range from 0 (no friction) to 1 (high friction).

5. How does the amount of friction in a plane impact flight safety?

The amount of friction in a plane can greatly impact flight safety. Too much friction can cause the plane to lose speed and control, making it difficult to take off or land safely. On the other hand, too little friction can make it challenging to slow down and stop the plane, which can lead to accidents. Therefore, it is crucial for pilots and engineers to carefully consider and manage the amount of friction in a plane for safe flight operations.

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