IDZ Ryabushko 2.2 Variant 28
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Number 1 are given the vector. It is necessary: a) to calculate the mixed product of three vectors; b) find the module of the vector product; c) calculate the scalar product of two vectors; d) check whether two vectors are collinear or orthogonal; e) check whether the three vectors a (4; -5; -4) are coplanar; b (5; -1; 0); c (2; 4; -3);
No. 2 The tops of the pyramid are at points A (3; 5; 3); B (–3; 2; 8); C (–3; –2; 6); D (7; 8; –2) ...
No. 3 Given three forces P (7; 3; –4); Q (3; –2; 2); R (–5; 4; 3); applied to point A (–5; 0; 4). Calculate a) the work produced by the resultant of these forces; when the point of its application, moving rectilinearly, moves to point B (4; –3; 5); b) the value
the moment of the resultant of these forces with respect to point B.
No. 2 The tops of the pyramid are at points A (3; 5; 3); B (–3; 2; 8); C (–3; –2; 6); D (7; 8; –2) ...
No. 3 Given three forces P (7; 3; –4); Q (3; –2; 2); R (–5; 4; 3); applied to point A (–5; 0; 4). Calculate a) the work produced by the resultant of these forces; when the point of its application, moving rectilinearly, moves to point B (4; –3; 5); b) the value
the moment of the resultant of these forces with respect to point B.
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