# Dynamically balance and angular momentum

• sgh1324

#### sgh1324

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.

It is not clear what you are trying to calculate from what, how?

Some notes:
angular momentum points along the rotation axis
torque is rate of change of angular momentum ...

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?