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Welcome to Physics Homework and Study Help, where you can ask questions and receive help on learning physics. We currently focus on helping questions in introductory level college physics and high school AP Physics courses.
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energy question

0 votes
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I am just doing questions for Energy. And why does the question always states the minimum work done? Does it mean there can be more work done? And why is the minimum work done (and not the work done) same as the gravitational energy of the boat? 

I know this seems stupid, but I'm really curious.

asked Apr 4, 2014 in Highschool Physics by R

1 Answer

0 votes
I am not sure which question (involving a boat) you are referencing, but I will try to answer your question generally.

Work done on a system adds energy to the system. There may be forces (friction, air resistance) that cause the system to lose kinetic/potential energy. The Minimum work required would assume friction and such forces do not exist.
answered Apr 7, 2014 by jcf1559 (2,140 points)
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