omes yv by a force P 1 force is FN, the

Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter7: Energy Of A System
Section: Chapter Questions
Problem 7.5P: A block of mass m = 2.50 kg is pushed a distance d = 2.20 m along a frictionless, horizontal table...
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Because dissipative work, which is negative, converts mechanical energy into a
thermal energy, Q, if we write Wats= Q, the above equation becomes
%3D
(KE + PE).
+Wais = (KE+ PE)rmal +Q
initial
final
Problems
Work and Energy
1. A box is being moved to the right at a constant velocity v by a force P
(parallel to v) along a level horizontal floor. The normal force is FN, the
kinetic frictional force is fk, and the weight of the box is mg.
(a) Draw a free-body diagram of this situation.
+y
+x
(b) Decide which forces do positive, zero and negative work. Give your
reasoning.
Transcribed Image Text:Because dissipative work, which is negative, converts mechanical energy into a thermal energy, Q, if we write Wats= Q, the above equation becomes %3D (KE + PE). +Wais = (KE+ PE)rmal +Q initial final Problems Work and Energy 1. A box is being moved to the right at a constant velocity v by a force P (parallel to v) along a level horizontal floor. The normal force is FN, the kinetic frictional force is fk, and the weight of the box is mg. (a) Draw a free-body diagram of this situation. +y +x (b) Decide which forces do positive, zero and negative work. Give your reasoning.
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