A lighthouse problem A lighthouse stands 500 m off a
Chapter 3, Problem 50(choose chapter or problem)
A lighthouse problem A lighthouse stands 500 m off a straight shore and the focused beam of its light revolves four times each minute. As shown in the figure, P is the point on shore closest to the lighthouse and Q is a point on the shore 200 m from P. What is the speed of the beam along the shore when it strikes the point Q? Describe how the speed of the beam along the shore varies with the distance between P and Q. Neglect the height of the lighthouse.
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