Torque of a square/rectangular solid body?

[westkid85]

anyone know how to calculate the torque of a square or rectangular solid body??

 

[Pommie]

That's like asking how to calculate the speed of a red car.

The answer is "more information required".

Mike.

 

[westkid85]

assume a 13cm(length) x 9cm(width) x 9cm(height)
with a mass of 1 Kg
how could the calculate be made?

 

[ericgibbs]

assume a 13cm(length) x 9cm(width) x 9cm(height)
with a mass of 1 Kg
how could the calculate be made?

hi,
Look up centre of inertia then determine the centre using the formula

and then use the standard torque formula for this centre.

Do you follow this.?

edit:
http://en.wiktionary.org/wiki/centre_of_inertia

**broken link removed**

edit:
**broken link removed**

 

[westkid85]

hmmm....lets make it this way
For a motor Torque equation
T(motor) = T(Load) + J(dw/dt) + T(friction)

Anyone know how to calculate the T(Load)?
Izzit the same calculation way as Mr.ericgibbs mention above?
By having the information:
assume a 13cm(length) x 9cm(width) x 9cm(height) [Rectangular Solid Body]
with a mass of 1 Kg

 

[Pommie]

By having the information:
assume a 13cm(length) x 9cm(width) x 9cm(height) [Rectangular Solid Body]
with a mass of 1 Kg

You have to find the center of the mass and measure how far (horizontally) the center of the mass is from the pivot. If it's 15cm then the torque is 15(cm)*1(kg) = 15kgcm.

Mike.