# How torque on Pulley works ?

1. Sep 17, 2011

### Anish Mohan

Hi,

I have a pully with two sticks attached to it as shown in figure. Each stick has a mass in it....which is free to move...and equal iin weight. Assume each mass is equally distant from the pully...what would be the torque on the pully ?..And in which direction the pully move ?

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Last edited: Sep 17, 2011
2. Sep 30, 2011

### Anish Mohan

Somebody plz give me a reply

3. Sep 30, 2011

### Lich King

Assume mass of string (how can stick be used in a single fixed pulley) to be nil because if there will be the string then it will make the calculation very complicated. Now if you apply suppose F Newtons of force. The the clockwise torque will be -(F x perpendicular distance from centre of pulley to line of action).

We assume clockwise to be negative.

The the anticlockwise torque will be F x perpendicular distance from centre of pulley to line of action.

Realize that in this case Tension of string = Force you are exerting on string.

4. Oct 2, 2011