Dynamically balance and angular momentum

In summary, the conversation discusses the direction of torque and angular momentum in a rotating system with attached weights. The person is trying to understand why the torque's direction is counterclockwise, while the angular momentum's direction is southeast. They mention that the torque's direction should be clockwise due to rotation, but the Wikipedia page states that it is counterclockwise. They are seeking clarification on why the torque's direction is counterclockwise.
  • #1
sgh1324
12
0
https://en.wikipedia.org/wiki/Balancing_of_rotating_masses

See the image in that page.

I know intuitively why a direction of torque is counterclockwise-because of a centrifugal force.

But an direction of angular momentum of that shaft with attached weights (ignore the shaft mass) is southeast direction.

And a torque of that body is an inward of page, which means clockwise direction.

Why I gets this conclusion? somebody help me.
 
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  • #2
It is not clear what you are trying to calculate from what, how?
What is your reasoning?

Some notes:
angular momentum points along the rotation axis
torque is rate of change of angular momentum ...
 
  • #3
the direction of angular momentum of that body is southeast direction.

and because of rotation, angular momentum rotates inward direction of page.

so, that means direction of torque(=chage of angular momentum) is clockwise.

but the wiki page said that the torque's direction is counterclockwise.

i can't understand wiki conclusion by reasoning - torque direction is clockwise.ps from note
angular momentum points along the rotation axis - you means that shaft?
 

What is dynamic balancing?

Dynamic balancing is a method used to ensure that rotating objects, such as engines or turbines, are in a state of equilibrium and do not cause excessive vibrations. This is achieved by adjusting the mass distribution of the rotating object.

What is angular momentum?

Angular momentum is a measure of the rotational motion of an object around an axis. It is calculated by multiplying the moment of inertia (a measure of an object's resistance to change in its rotational motion) by the angular velocity (the rate at which the object is rotating).

Why is it important to balance rotating objects?

Balancing rotating objects is important because unbalanced objects can cause excessive vibrations, which can lead to equipment failure and safety hazards. Balancing also ensures efficient and smooth operation of the machinery.

How is dynamic balancing achieved?

Dynamic balancing is achieved by using specialized equipment, such as balancers or vibration analyzers, to measure the level of vibration and determine the amount and location of mass that needs to be added or removed from the rotating object. This process is repeated until the object is in a state of equilibrium.

What are some common applications of dynamic balancing?

Dynamic balancing is commonly used in the manufacturing and maintenance of various rotating machinery, such as engines, turbines, fans, and pumps. It is also used in the automotive and aerospace industries to balance rotating parts of vehicles and aircraft.

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