A man pushes an 8 kg crate, making it travel a distance of 5.0 meters upwards on an inclined, frictionless plane that makes an angle of 30° with the horizontal. The force that man exerts is parallel to the surface of the inclined plane. If the speed of the crate is constant, the work done by man is gravity acceleration g=10 m/s2. a) 140 J b)260 J c)–200J d)200J e) 61 J

A man pushes an 8 kg crate, making it travel a distance of 5.0 meters upwards on an inclined, frictionless plane that makes an angle of 30° with the horizontal. The force that man exerts is parallel to the surface of the inclined plane. If the speed of the crate is constant, the work done by man is gravity acceleration g=10 m/s2. a) 140 J b)260 J c)–200J d)200J e) 61 J

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter9: Energy In Nonisolated Systems

Section: Chapter Questions

Problem 17PQ

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