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Physics / Sears and Zemansky's University Physics with Modern Physics 13 / Chapter 2 / Problem 98CP

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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An alert hiker secs a boulder fall from the top of a

Chapter 2, Problem 98CP

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QUESTION:

Problem 98CP

An alert hiker secs a boulder fall from the top of a distant cliff and notes that it takes 1.30 s for the boulder to fall the last third of the way to the ground. You may ignore air resistance. (a) What is the height of the cliff in meters? (b) If in part (a) you get two solutions of a quadratic equation and you use one for your answer, what does the other solution represent?

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QUESTION:

Problem 98CP

An alert hiker secs a boulder fall from the top of a distant cliff and notes that it takes 1.30 s for the boulder to fall the last third of the way to the ground. You may ignore air resistance. (a) What is the height of the cliff in meters? (b) If in part (a) you get two solutions of a quadratic equation and you use one for your answer, what does the other solution represent?

ANSWER:

Solution 98CP

Let the total distance is “s”.

The object falls 1/3rd of the total distance in 1.30 secs.

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