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Torque Question for Boffins
NigeEss - 4/8/06 at 02:47 PM

Anyone have a calculation I could use to calculate torque applied using a
lever of length x and load of y grammes ?

It's for a physics lesson thing.

iank - 4/8/06 at 02:52 PM

More than you could ever need
http://en.wikipedia.org/wiki/Torque

matt_claydon - 4/8/06 at 02:55 PM

Yeah, torque in Newton-Metres is Load in Newtons x Length in metres (surprisingly )


1 Newton is 102 grammes so:

Torque = Mass(g) x Length(m) / 102


Hope this helps...
Matt.


[Edited on 4/8/06 by matt_claydon]

gingerprince - 4/8/06 at 02:56 PM

quote:
Originally posted by NigeEss
Anyone have a calculation I could use to calculate torque applied using a
lever of length x and load of y grammes ?

It's for a physics lesson thing.


http://www.comfsm.fm/~dleeling//physics/torque.html

Torque is force x distance x sin(angle)

SO at 90 degrees the torque eg of 1 kilo at 1metre from fulcrum is 1 x 1 x sin(90) = 1NM. Torque decreases with sin as angle changes.

matt_claydon - 4/8/06 at 03:00 PM

quote:
Originally posted by NigeEss

SO at 90 degrees the torque eg of 1 kilo at 1metre from fulcrum is 1 x 1 x sin(90) = 1NM. Torque decreases with sin as angle changes.


That would actually be 1kgm = 9.81Nm.

Good point about the angle though.

Cheers,
Matt.

[Edited on 4/8/06 by matt_claydon]

gingerprince - 4/8/06 at 04:07 PM

quote:
Originally posted by matt_claydon
That would actually be 1kgm = 9.81Nm.


Depends what planet you're on. I was working on the assumption of a planet slightly larger than earth where 1Kg exherts 1N

You were indeed correct to point out my c0ck up tho!

[Edited on 4/8/06 by gingerprince]

smart51 - 4/8/06 at 04:14 PM

quote:
Originally posted by gingerprince
quote:
Originally posted by matt_claydon
That would actually be 1kgm = 9.81Nm.


Depends what planet you're on. I was working on the assumption of a planet slightly larger than earth where 1Kg exherts 1N

You were indeed correct to point out my c0ck up tho!

[Edited on 4/8/06 by gingerprince]


Gravity varies with altitude and latitude. Find yourself a nice below-sea-level valley away from the equator and your 1kg = 1N fantasy might come true!

trikerneil - 4/8/06 at 05:57 PM

Also depends on underlying rock.

tks - 4/8/06 at 07:42 PM

i wanted a transmission box because my prop had quet some angle

20 / 30 degrees.


Tks