A boat is pulled by a winch on a dock, and the winch is 12 feet above the deck of the boat (see figure). The winch pulls the rope at a rate of 4 feet per second. Find the speed of the boat when 15 feet of rope is out. What happens to the speed of the boat as it gets closer and closer to the dock? STEP 1: STEP 2: STEP 4: 2x Let x be the distance from the boat to the dock and y be the length of the rope. Write the original equation. 12² + x² = Differentiate the equation with respect to x and y. dx dt dx 99 99 는 dx dt dt 12 dt dx Not draws to scale STEP 3: Solve for dx/dt (in ft/sec) by substituting the values for x, y, and dy/dt. (Round your answer for dx/dt to one decimal place.) 15 -(-4) 114 ft/sec = = = = ft/sec dy dt dy dt ---Select--- State the appropriate conclusion. As x → 0, dx dt 8
A boat is pulled by a winch on a dock, and the winch is 12 feet above the deck of the boat (see figure). The winch pulls the rope at a rate of 4 feet per second. Find the speed of the boat when 15 feet of rope is out. What happens to the speed of the boat as it gets closer and closer to the dock? STEP 1: STEP 2: STEP 4: 2x Let x be the distance from the boat to the dock and y be the length of the rope. Write the original equation. 12² + x² = Differentiate the equation with respect to x and y. dx dt dx 99 99 는 dx dt dt 12 dt dx Not draws to scale STEP 3: Solve for dx/dt (in ft/sec) by substituting the values for x, y, and dy/dt. (Round your answer for dx/dt to one decimal place.) 15 -(-4) 114 ft/sec = = = = ft/sec dy dt dy dt ---Select--- State the appropriate conclusion. As x → 0, dx dt 8
Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter21: Direct And Inverse Proportions
Section: Chapter Questions
Problem 15A: Of two gears that mesh, the one that has the greater number of teeth is called the gear, and the one...
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