Force $\Gamma=80i+50j-60k$ passes through a point A (6, 2, 6). Compute its moment about a point $B (8, 1, 4).$

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Force

$\Gamma=80i+50j-60k$ passes through a point A (6, 2, 6). Compute its moment about a point

$B (8, 1, 4).$

written 8.7 years ago by

teamques10 ★ 69k

• modified 4.9 years ago

engineering mechanics

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written 8.7 years ago by

teamques10 ★ 69k

Given :- $\vec F = 80i+50j-60k \\ \vec{r_A } = 6i+2j+6k \\ \vec {r_B } = 8i+j+4k$

To find:-

Moment about $B \vec{ (M_B ) }$

Solution:-

Position vector of A w.r.t B is

$\vec{r_{AB} }= \vec{r_A } - \vec{r_B }\\ =(6i+2j+6k)-(8i+j+4k) \\ \vec{r_{AB}} = -2i+j+2k \\ Now, \\ …

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