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Unformatted text preview: M408D Practice problems for Exam #4 Directions . Indicate the correct answer for each problem by filling in the appropriate space, as in (A) ( • ) (C) (D) (E). 1) If u = ( 1 , 1 , ) and w = j + k , then the vector v in the figure is: v u w (A) ( , 1 2 , 1 2 ) . (B) ( 1 2 , 1 2 , ) . (C) ( , 2 3 , 2 3 ) . (D) ( 2 3 , 1 2 , ) . (E) ( 2 3 , , 1 2 ) . 2) In which of the following figures do the vectors satisfy a + b + c = (or a + b = − c )? (A) c a b (B) a b c (C) c a b (D) a b c (E) a b c 3) Which of the following sets of equations describes a line through the point P (1 , 2 , 3) that is perpendicular to the yzplane? (A) x ( t ) = 1 + t, y ( t ) = 2 t, z ( t ) = 3 t . (B) x ( t ) = 1 , y ( t ) = 2 + t, z ( t ) = 3 + t . (C) x ( t ) = 1 − t, y ( t ) = 2 , z ( t ) = 3. (D) x ( t ) = 1 + t, y ( t ) = 2 , z ( t ) = 3 + t . (E) x ( t ) = 1 + t, y ( t ) = 3 t, z ( t ) = 2 + t . 4) An 8Newton force is applied to a 12cm lever. What is the magnitude of the torque T = vector PQ × F ?...
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This note was uploaded on 01/27/2011 for the course M 408d taught by Professor Sadler during the Spring '07 term at University of Texas.
 Spring '07
 Sadler

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