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Section 9.4

# Section 9.4 - a b are positive negative or 0 The...

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12/9/08 7:40 PM Section 9.4 Page 1 of 3 http://www.webassign.net/[email protected]/[email protected] Section 9.4 (Homework) MICKLES BRANDON L MA 242, section 008, Fall 2008 Instructor: April Alston Web Assign Current Score: 17 out of 17 Due: Friday, September 5, 2008 10:04 PM EDT Description The Cross Product The due date for this assignment is past. Your work can be viewed below, but no changes can be made. 1. [SCalcCC2 9.4.02.] 2.25/2.25 points You are given the following. Find | u v |. 43.3013 43.3 Determine whether u v is directed into the computer screen or out of the computer screen. into the computer screen out of the computer screen 2. [SCalcCC2 9.4.04.] 2.75/2.75 points The figure shows a vector a in the xy -plane and a vector b in the direction of k . Their lengths are | a | = 3 and | b | = 2.

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12/9/08 7:40 PM Section 9.4 Page 2 of 3 http://www.webassign.net/[email protected]/[email protected] (a) Find | a b |. 6 6 (b) Use the right-hand rule to decide whether the components of
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Unformatted text preview: a b are positive, negative, or 0. The x-component is positive positive . The y-component is negative negative . The z-component is . 3. [SCalcCC2 9.4.06.] 3/3 points Find the magnitude of the torque about P if a 36 lb force is applied as shown. 196.7076581 197 ft-lb 4. [SCalcCC2 9.4.16.] 3/3 points Find the area of the parallelogram with vertices K (1, 2, 3), L (1, 3, 6), M (3, 8, 6), and N (3, 7, 3). 16.279 16.3 5. [SCalcCC2 9.4.22.] 3/3 points 12/9/08 7:40 PM Section 9.4 Page 3 of 3 http://www.webassign.net/[email protected]/[email protected] Find the volume of the parallelepiped determined by the vectors a , b , and c . a = 7 i + 8 j- 8 k b = i- j c = 2 i + 3 k 61 61 6. [SCalcCC2 9.4.24.] 3/3 points Find the volume of the parallelepiped with adjacent edges PQ , PR , and PS . P ( , 2 , 4 ), Q ( 2 , 5 , 7 ), R (-1 , 1 , 3 ), S ( 6 , , 6 ) 4 4 cubic units...
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Section 9.4 - a b are positive negative or 0 The...

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