Cwww.webassign.net/web/Student/Assignment-Responses/flast?dep-1 Watch t 6?0-2 po

Question

Cwww.webassign.net/web/Student/Assignment-Responses/flast?dep-1 Watch t 6?0-2 points SerCP11 22 P047 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 below. The distance from his eyes to the ground is h 1.78 m. (Assume ?-30.30.) 80 m (a) What is the horizontal distance d from the man to the edge of the drainage ditch? (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 th Read

Explanation / Answer

a) tan theta = d / h

d = h * tan theta = 1.78 * tan 30.3

horizontal distance = 1.04 m

b) n * sin theta = 1 * sin theta2

theta2 = sin-1 (1.33 * sin 30.3 )= 42.1 deg

tan theta2 = x / h

x = 1.78 * tan 42.1

x = 1.61 m

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