{"id":388,"date":"2020-04-19T15:59:14","date_gmt":"2020-04-19T19:59:14","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/humanbiomechanics\/part\/chapter-7-work-power-and-energy\/"},"modified":"2020-04-19T15:59:14","modified_gmt":"2020-04-19T19:59:14","slug":"chapter-7-work-power-and-energy","status":"publish","type":"part","link":"https:\/\/pressbooks.bccampus.ca\/humanbiomechanics\/part\/chapter-7-work-power-and-energy\/","title":{"raw":"Chapter 7: Work, Power, and Energy","rendered":"Chapter 7: Work, Power, and Energy"},"content":{"raw":"\n<div class=\"bcc-box bcc-highlight\">\n<h3>Chapter Objectives<\/h3>\nAfter this chapter, you will be able to:\n<ul>\n \t<li>Explain how an object must be displaced for a force on it to do work.<\/li>\n \t<li>Explain how relative directions of force and displacement determine whether the work done is positive, negative, or zero.<\/li>\n \t<li>Explain work as a transfer of energy and net work as the work done by the net force.<\/li>\n \t<li>Explain gravitational potential energy in terms of work done against gravity.<\/li>\n \t<li>Show that the gravitational potential energy of an object of mass <em><strong>m<\/strong><\/em> at height <em><strong>h<\/strong><\/em> on Earth is given by <strong>PE<sub>g<\/sub> = <em>mgh<\/em><\/strong>.<\/li>\n \t<li>Explain the law of the conservation of energy.<\/li>\n \t<li>Calculate power by calculating changes in energy over time.<\/li>\n \t<li>Explain the human body\u2019s consumption of energy when at rest vs. when engaged in activities that do useful work.<\/li>\n \t<li>Calculate the conversion of chemical energy in food into useful work.<\/li>\n<\/ul>\n<\/div>\n&nbsp;\n","rendered":"<div class=\"bcc-box bcc-highlight\">\n<h3>Chapter Objectives<\/h3>\n<p>After this chapter, you will be able to:<\/p>\n<ul>\n<li>Explain how an object must be displaced for a force on it to do work.<\/li>\n<li>Explain how relative directions of force and displacement determine whether the work done is positive, negative, or zero.<\/li>\n<li>Explain work as a transfer of energy and net work as the work done by the net force.<\/li>\n<li>Explain gravitational potential energy in terms of work done against gravity.<\/li>\n<li>Show that the gravitational potential energy of an object of mass <em><strong>m<\/strong><\/em> at height <em><strong>h<\/strong><\/em> on Earth is given by <strong>PE<sub>g<\/sub> = <em>mgh<\/em><\/strong>.<\/li>\n<li>Explain the law of the conservation of energy.<\/li>\n<li>Calculate power by calculating changes in energy over time.<\/li>\n<li>Explain the human body\u2019s consumption of energy when at rest vs. when engaged in activities that do useful work.<\/li>\n<li>Calculate the conversion of chemical energy in food into useful work.<\/li>\n<\/ul>\n<\/div>\n<p>&nbsp;<\/p>\n","protected":false},"parent":0,"menu_order":7,"template":"","meta":{"pb_part_invisible":false,"pb_part_invisible_string":""},"contributor":[],"license":[],"class_list":["post-388","part","type-part","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/pressbooks.bccampus.ca\/humanbiomechanics\/wp-json\/pressbooks\/v2\/parts\/388","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.bccampus.ca\/humanbiomechanics\/wp-json\/pressbooks\/v2\/parts"}],"about":[{"href":"https:\/\/pressbooks.bccampus.ca\/humanbiomechanics\/wp-json\/wp\/v2\/types\/part"}],"version-history":[{"count":0,"href":"https:\/\/pressbooks.bccampus.ca\/humanbiomechanics\/wp-json\/pressbooks\/v2\/parts\/388\/revisions"}],"wp:attachment":[{"href":"https:\/\/pressbooks.bccampus.ca\/humanbiomechanics\/wp-json\/wp\/v2\/media?parent=388"}],"wp:term":[{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/humanbiomechanics\/wp-json\/wp\/v2\/contributor?post=388"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/humanbiomechanics\/wp-json\/wp\/v2\/license?post=388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}