Answered: 1. Consider the first tennis ball that…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter1: Introduction And Vectors

Section: Chapter Questions

Problem 5P

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d= 1/2 (vi + vf)t , vf = vi + at d = vit + 1/2at2 , vf2 = vi2 +2ad. Practice For each question, you must SHOW ALL WORK, including equations, and answers with appropriate units. 1. Consider the first tennis ball that was dropped from a height of 20.0 meters. Assume g = 9.81 m/s2. How much time will pass before it hits the ground? SHOW ALL WORK (including equation & answer with units) 2. What will be its final velocity just as it strikes the ground? SHOW ALL WORK (including equation & answer with units) 3. Consider the second tennis ball that was thrown down with an initial velocity of 4.00 m/s from the same starting height of 20.0 meters. How fast will it be falling (final velocity) as it strikes the ground? SHOW ALL WORK (including equation & appropriate units) 4. Compare your answers to question #2 and #3. In a few sentences, explain which tennis ball had the greater final velocity and why these results either do, or do not, make sense based on what you know about the kinematics of free fall.

1. Consider the first tennis ball that was dropped from a height of 20.0
meters. Assume g = 9.81 m/s².
How much time will pass before it hits the ground? SHOW ALL
WORK (including equation & answer with units)
2. What will be its final velocity just as it strikes the ground? SHOW
ALL WORK (including equation & answer with units)
3. Consider the second tennis ball that was thrown down with an
initial velocity of 4.00 m/s from the same starting height of 20.0
meters. How fast will it be falling (final velocity) as it strikes the
ground?
SHOW ALL WORK (including equation & appropriate units)
4. Compare your answers to question #2 and #3. In a few sentences,
explain which tennis ball had the greater final velocity and why
these results either do, or do not, make sense based on what you
know about the kinematics of free fall.

|d= (v₁ + y)
Vf = V₁ + at
d=yt+at²
v₁² = v₁² + 2ad

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