- Joined
- May 22, 2010
- Messages
- 335
- Reaction score
- 2
I can't seem to be able to explain the following discrepancy.
If I raise a book a height h above the ground, I do mgh work on the book while gravity does -mgh cause its in the opposite of the displacement. The net work on this book is zero if you add up the work done by me and gravity yet the book obviously gain some potential energy. How can the book have zero net work yet have a larger potential energy?
If I raise a book a height h above the ground, I do mgh work on the book while gravity does -mgh cause its in the opposite of the displacement. The net work on this book is zero if you add up the work done by me and gravity yet the book obviously gain some potential energy. How can the book have zero net work yet have a larger potential energy?