Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 6th Edition
6
Work and Energy
Change chapter

6-1: Work, Constant Force
6-3: Kinetic Energy; Work-Energy Principle
6-4 and 6-5: Potential Energy
6-6 and 6-7: Conservatino of Mechanical Energy
6-8 and 6-9: Law of Conservation of Energy
6-10: Power

Problem 2
A
Wf=1.27×104JW_f=1.27 \times 10^4J
Giancoli 6th Edition, Chapter 6, Problem 2 solution video poster
Padlock

In order to watch this solution you need to have a subscription.

VIDEO TRANSCRIPT

The work that the firefighter needs to do equals the force that he has to apply which is equal to his weight. So the firefighter's force times the distance over which that force is applied. In other words the height that he climbs. And there’s no horizontal forces in this question because we assume he’s going at constant speed horizontally. So there’s no net force that way. So it’s only this vertical force against gravity times the distance that he climbs. So in the sixth edition we have 65 kilograms times 9.8 newtons for every kilogram times 20 meters and that gives 1.27 times 10 to the 4 joules. In the fifth edition you have 75 kilograms here and the firefighter climbs 10.0 meters giving a fifth edition answer of ### times ## to the # joules.

COMMENTS
By Mr. Dychko on Thu, 9/30/2010 - 10:23 PM

Certainly, you can visit Chapter 5 which you're automatically subscribed to.

By gmandy on Thu, 9/30/2010 - 3:10 AM

I WANT TO SEE A COUPLE OF EXAMPLE SOLUTIONS?

By gmandy on Thu, 9/30/2010 - 3:12 AM

i WANT TO SEE SOME SOLUTIONS TO THE PROBLEMS

By 100alexis on Sat, 2/5/2011 - 5:50 AM

where are the solutions?

By siwievaris on Fri, 11/20/2020 - 5:32 PM

Now why is it not showing the questions first before you start answering

By Mr. Dychko on Thu, 12/3/2020 - 11:16 PM

Thank you for the comment. The questions are shown only for the 7th edition solutions.
All the best,
Shaun

Find us on:

Facebook iconTrustpilot icon
Giancoli Answers, including solutions and videos, is copyright © 2009-2024 Shaun Dychko, Vancouver, BC, Canada. Giancoli Answers is not affiliated with the textbook publisher. Book covers, titles, and author names appear for reference purposes only and are the property of their respective owners. Giancoli Answers is your best source for the 7th and 6th edition Giancoli physics solutions.