1. Find the vector phasor for the instantaneous vector: (a) A = cos wt, (b) A = ŷ sin wt, (c) Ã = î cos wt + ŷ sin wt, and (d) A = â cos wt – ŷ sin wt. Note: etjn/2 = ±j. %3D %3D %3D

Obtain expressions in component form for the position vectors having the following polar coordinates. (a) 12.2 m, 140° counterclockwise from the +x axis R = (b) 3.20 cm, 40.0° counterclockwise from the +x axis %3D cm (c) 24.0 in., 210° counterclockwise from the +x axis Ta in. %3D Need Help? Master It

What is the coordinate (centroid) of x to the triangle? y 300 mm 400 mm 300 mm 300 mm :

Determine the magnitude of the resultant of the given factors then give the direction of the resultant.

1.  Ax= 3.30 mm, Ay= -1.70 mm Express your answer in degrees.   2.  Ax= 4.80 mm, Ay= 1.20 mm Express your answer in degrees.   3.  Ax= -3.90 mm, Ay= 2.50 mm Express your answer in degrees.

Ä (A = 44.0) 56.0 28.0 ČC= 31.0) Let resultant vector be R À - B. The x-component of resultant vector, Ry, is units. || B (B 26.5)

Session 18637611 Jump to V 2 4. 7. 8. numerical question For the given right triangle, solve for the unknown side length if 02 = 30° 02 y = 10 m y3D %D Submit response < Join another session 9 Send a message to the instructor 5. 3.

Find the angle between the vectors Á = 3î – 5ĵ + 4k and B = 2î – 3k. %3D

When a man stands near the edge of an empty drainage ditch of depth 2.80 m, he can barely see the boundary between the opposite wall and bottom of the ditch as in Figure (a) shown below. The distance from his eyes to the ground is h = 1.88 m. (Assume 0 = 27.6°.) IA h d a b Ө m 0 2.80 m (a) What is the horizontal distance d from the man to the edge of the drainage ditch? d = (b) After the drainage ditch is filled with water as in Figure (b) shown above, what is the maximum distance x the man can stand from the edge and still see the same boundary? X = m

Need help finding Y-coordinate I tried 2.21, 2.2, 2.208, and 2.206 and all were wrong.