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These are “plug-in-the-number” type activities | Ch 3 - 17PC

Conceptual Physics | 12th Edition | ISBN: 9780321909107 | Authors: Paul G. Hewitt ISBN: 9780321909107 29

Solution for problem 17PC Chapter 3

Conceptual Physics | 12th Edition

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Conceptual Physics | 12th Edition | ISBN: 9780321909107 | Authors: Paul G. Hewitt

Conceptual Physics | 12th Edition

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Problem 17PC

These are “plug-in-the-number” type activities to familiarize yon with the equations that link the concepts of physics. They are mainly one-step substitutions and are less challenging than the Problem. ? An object is dropped from rest and falls freely. After 7 s, calculate its instantaneous speed.

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Step 1 of 3

Solution 17PC The equation of motion that has to be used here is v = u + at. Given that, u = 0 m/s Acceleration a = g (for free fall) Acceleration, a = 9.8 m/s 2 Time t = 7 s Hence, instantaneous speed after 7 s is v = 0 m/s + 9.8 m/s × 7 s v = 0 m/s + 68.6 m/s v = 68.6 m/s Therefore, the object will have an instantaneous speed of 68.6 m/s.

Step 2 of 3

Chapter 3, Problem 17PC is Solved
Step 3 of 3

Textbook: Conceptual Physics
Edition: 12
Author: Paul G. Hewitt
ISBN: 9780321909107

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These are “plug-in-the-number” type activities | Ch 3 - 17PC