Answer
$\bigtriangleup PE=-4800000 ft.lbf$
Work Step by Step
Mass of the crane$ = \frac{1200lbf*32.174lb.ft/sec^2}{32.05ft/sec^2*1lbf} = 1204.64lb$
$\bigtriangleup PE=mg(z_2-z_1) $
$\bigtriangleup PE=12000*(0-400) = -4.8*10^6 ft.lbf$
Fundamentals of Engineering Thermodynamics 8th Edition
by Moran, Michael J.; Shapiro, Howard N.; Boettner, Daisie D.; Bailey, Margaret B.
Published by
Wiley
ISBN 10:
1118412931
ISBN 13:
978-1-11841-293-0
Chapter 2 - Problems: Developing Engineering Skills - Page 81: 2.4
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
