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Sears and Zemansky's University Physics with Modern Physics | 13th Edition | ISBN: 9780321696861 | Authors: Hugh D. Young; Roger A. Freedman; A. Lewis Ford
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Solved: On a 20-mile bike ride, you ride the first 10

Chapter 2, Problem 56P

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QUESTION:

Problem 56P

On a 20-mile bike ride, you ride the first 10 miles at an average speed of 8 mi/h. What must your average speed over the next 10 miles be to have your average speed for the total 20 miles be (a) 4 mi/h? (b) 12 mi/h? (c) Given this average speed for the first 10 miles, can you possibly attain an avwerage speed of 16 mi/h for the total 20-mile ride? Explain.

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QUESTION:

Problem 56P

On a 20-mile bike ride, you ride the first 10 miles at an average speed of 8 mi/h. What must your average speed over the next 10 miles be to have your average speed for the total 20 miles be (a) 4 mi/h? (b) 12 mi/h? (c) Given this average speed for the first 10 miles, can you possibly attain an avwerage speed of 16 mi/h for the total 20-mile ride? Explain.

ANSWER:

Solution 56P

Step 1:

        Total distance (x) = 20 miles

        Average speed for first 10 miles  = 8 miles/h

        

        To find average speed for next 10 miles so that total average speed will be

Problem (a)

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