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Explain conditions for equilibrium for forces in space.
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(i) Σ Fx=0

Sum of all horizontal components should be zero.

(ii) Σ Fy=0

Sum of all vertical components should be zero.

(iii) Σ Fz=0

Sum of all force components along z-axis should be zero.

(iv) Σ Mx=0

Sum of all moments about x-axis should be zero.

(v) Σ My=0

Sum of all moments about y-axis should be zero.

(vi) Σ Mz=0

Sum of all moments about z-axis should be zero.

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