Discuss whether any work is being done by each of the following agents and, if so, whether the work is positive or negative: (a) a chicken scratching the ground O no work O positive work O negative work (b) a person studying O no work O positive work O negative work (c) a crane lifting a bucket of concrete O no work O positive work O negative work (d) the gravitational force on the bucket of concrete O no work O positive work O negative work (e) the leg muscles of a person in the act of sitting down O no work O positive work O negative work

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter6: Energy Of A System
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Discuss whether any work is being done by each of the following agents and, if so, whether the work is positive or negative:
(a) a chicken scratching the ground
O no work
O positive work
negative work
(b) a person studying
O no work
O positive work
O negative work
(c) a crane lifting a bucket of concrete
O no work
O positive work
O negative work
(d) the gravitational force on the bucket of concrete
O no work
O positive work
O negative work
(e) the leg muscles of a person in the act of sitting down
O no work
O positive work
O negative work
Transcribed Image Text:Discuss whether any work is being done by each of the following agents and, if so, whether the work is positive or negative: (a) a chicken scratching the ground O no work O positive work negative work (b) a person studying O no work O positive work O negative work (c) a crane lifting a bucket of concrete O no work O positive work O negative work (d) the gravitational force on the bucket of concrete O no work O positive work O negative work (e) the leg muscles of a person in the act of sitting down O no work O positive work O negative work
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