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Physics / Physics with MasteringPhysics 4 / Chapter 2 / Problem 62P

Physics with MasteringPhysics | 4th Edition | ISBN: 9780321541635 | Authors: James S. Walker

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IP A boat is cruising in a straight line at a constant

Chapter 2, Problem 62P

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QUESTION:

Problem 62P

IP A boat is cruising in a straight line at a constant speed of 2.6 m/s when it is shifted into neutral. After coasting 12 m the engine is engaged again, and the boat resumes cruising at the reduced constant speed of 1.6 m/s. Assuming constant acceleration while coasting, (a) how long did it take for the boat to coast the 12 m? (b) What was the boat's acceleration while it was coasting? (c) When the boat had coasted for 6.0 m, was its speed 2.1 m/s, more than 2.1 m/s, or less than 2.1 m/s? Explain.

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QUESTION:

Problem 62P

IP A boat is cruising in a straight line at a constant speed of 2.6 m/s when it is shifted into neutral. After coasting 12 m the engine is engaged again, and the boat resumes cruising at the reduced constant speed of 1.6 m/s. Assuming constant acceleration while coasting, (a) how long did it take for the boat to coast the 12 m? (b) What was the boat's acceleration while it was coasting? (c) When the boat had coasted for 6.0 m, was its speed 2.1 m/s, more than 2.1 m/s, or less than 2.1 m/s? Explain.

ANSWER:

Step 1 of 5

The objective here is to first determine the time taken by the boat for coasting the given distance. Then we have to calculate the acceleration of the boat when it was coasting. Also we should find the final speed of the boat when it had coasted for the distance, 6 m and then compare it with the given speed 2.1 m/s.

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