IDZ 2.2 - Option 20. Decisions Ryabushko AP

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Uploaded: 31.05.2014
Content: 20v-idz2.2.doc (112 kB)

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1. Given the vectors a, b, and c. It is necessary to: a) calculate the mixed product of three vectors; b) Find the unit vector product; c) to calculate the inner product of two vectors; g) check whether collinear or orthogonal two vectors; e) verify whether the three vectors are coplanar.
 1.20 a = -9i + 4j - 5k, b = i - 2j + 4k, c = -5i + 10j - 20k; a) -2a, 7b, 5c; b) -6b, 7c; a) 9a, 4c; r) b, c; d) -2a, 7b, 4c.

 2. The top of the pyramid are located at points A, B, C and D. Calculate: a) the area of the said faces; b) cross-sectional area, passing through the middle of the rib l and two top of the pyramid; c) the volume of the pyramid ABCD.
 2.20 A (7, -1, -2), B (1, 7, 8), C (3, 7, 9), D (-3, -5, 2); a) ACD; b) l = BD, A and C

 3. Given three powers P, Q, R, applied to point A. Calculate: a) work done by the resultant of these forces, when the point of its application, moving rectilinearly moves to point B; b) the amount of time the resultant of these forces about point B.
 3.20 P = (3, -4, 2), Q (2, 3, -5), R (-3, -2, 4), A (5, 3, -7), B (4, -1, -4)

Additional information

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)

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