Consider the curve - = (e', e-†, 4t) . r = The component, in the direction of the vector (-1,1,2), of the velocity vector at time t = 0 equals 1 V8 O None of these options are true 1 V6

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Two position vectors lie in a plane. The first, vector rA, points at an angle of 20° below the positive x-axis and has a magnitude of 53.5 m. The second, vector, points at an angle of 42.5° above the positive x-axis and has a magnitude of 75 m. - (a) Choose the diagram below that is correct a graphical representation of rA + B +y +y magnitude +y direction FB ŤA ŤA rc rc IB +X +X +y ŤA FB ŤA fc FC 1 +X What are the rules for graphical vector addition? How should the vectors be placed? How do you represent the resultant given the placement of individual vectors? (b) What is the magnitude and direction of vector ? Give the direction as an angle measured counterclockwise from the positive x-axis? +X 13.8933 X How do you add vectors using components? How do you calculate vector components using trigonometric relations? Be careful of the signs of the components; check them against the directions of the vectors. m ° (counterclockwise from the +x-axis)

Someone drives 215 km west before turning to go 98 km southwest at 45°. How far are they from where they started? Express your answer using three significant figures. 293 km Submit Previous Answers ✓ Correct Part B In what direction are they from where the started, measured counterclockwise from due east?