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Vector Addition

A force 10 ...

Question

A force $10^- k N$ acts on the origin of the coordinate system. Find the torque about the point $(1 m, - 1 m, 0 m) .$

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Solution

Given,

Force, $F = 10 (-^k) N$

$\to r =^i -^j$

Torque,

$τ = \to r \times \to F$

$τ = (^i -^j) \times (- 10^k)$

$τ = 10^i - 10^j$

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