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Unformatted text preview: Find the angle between the vectors. (First find an exact expression and then approximate to the nearest degree.) a = (6, -3, 2) b = (2, 1, -2) 76.225853 76 6. [SCalcCC2 9.3.24.] 6/6 points Find the scalar and vector projections of b onto a . a = 2 i- 3 j + k , b = i + 6 j- 2 k Scalar projection-4.8107-4.81 Vector projection-18/7-2.57 i + 27/7 3.86 j + -9/7-1.29 k 7. [SCalcCC2 9.3.30.] 2/2 points Find the work done by a force of 27 lb acting in the direction N50W in moving an object 7 ft due west. 144.7824 145 ft-lb 12/9/08 7:40 PM Section 9.3 Page 3 of 3 http://www.webassign.net/v4cgiblmickle@ncsu/student.pl?a=20081210004019blmickle@ncsu15278239 8. [SCalcCC2 9.3.32.] 3/3 points A wagon is pulled a distance of 40 m along a horizontal path by a constant force of 20 N. The handle of the wagon is held at an angel of 30 above the horizontal. How much work is done? 692.820323 693 joules...
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This note was uploaded on 11/15/2010 for the course MA 242 taught by Professor Bliss during the Spring '08 term at N.C. State.
- Spring '08
- Dot Product