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Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 7th Global Edition
2
Describing Motion: Kinematics in One Dimension
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2-1 to 2-3: Speed and Velocity
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2-4: Acceleration
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2-5 and 2-6: Motion at Constant Acceleration
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2-7: Freely Falling Objects
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2-8: Graphical Analysis
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Problem 40
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  1. 32 m32\textrm{ m}
  2. 5.1 s5.1\textrm{ s}
Giancoli 7th "Global" Edition, Chapter 2, Problem 40 solution video poster
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COMMENTS
By arishenryl on Tue, 9/27/2022 - 12:02 AM

Why couldn't we use the 2nd kinematics equation: the displacement = (v+v0/2)(time)?

By Mr. Dychko on Tue, 9/27/2022 - 1:06 PM

Hi arishenryl, thank you for the question. Solving part (a) first wouldn't be possible with d=v+vo2td = \dfrac{v + v_\textrm{o}}{2}t since we don't know tt, the time it takes to get to the maximum height. We could use that formula after solving part (b), but it's a bit risky using values you've calculated in subsequent parts of the question.
Hope that helps,
Shaun

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