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The moment about the point M(-2, 4, -6) of the force represented in magnitude and position AB, where the points A and B have the coordinates (1, 2, -3) and (3, -4, 2) respectively, is |
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Answer» `8hati-9hatj-14hatk` `= 2hati- 6 hatj +5hatk` MOMENT of FORCEF withrespectto M `=MAxxF ` ` :'MA =(1+2)hati+(2-4)hatj+(-3+6)hatk =3hati- 2hatj + 3 hatk` Now `,MA xxF =|{:(hati,hatj,hatk),(3,-2,3),(2,-6,5):}|` `=hati (-10+18)-hatj (15-6)+hatk(-18+4)` `=8 hati -9hatj -1hatk` |
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