A light is to be placed atop a pole of height feet to illuminate a busy traffic
Question:
(a) How tall should the light pole be to maximize l?
(b) Suppose that the light pole is feet tall and that a woman is walking away from the base of the pole at the rate of 4 ft/s. At what rate is the intensity of the light at the point on her back 4 ft above the ground decreasing when she reaches the outer edge of the traffic circle?
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Related Book For
Principles Of Foundation Engineering
ISBN: 9781337705028
9th Edition
Authors: Braja M. Das, Nagaratnam Sivakugan
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