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April 19, 2015

April 19, 2015

Posted by **Tried, but to no avail** on Thursday, May 24, 2012 at 3:16pm.

Please help

- Physics -
**Elena**, Thursday, May 24, 2012 at 6:12pmIf F= - (m•g)•j and r = (x) •I + (y) •j.

τ= - (m•g•x) [i x j] – (m•g•y)[j xj] = (m•g•x)•k.

i, j, k are the unit vectors of Cartesian coordinate system.

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