Hang a pen by a piece of string. 1.Is the pen at rest or in motion, explain.2.are there forces acting of the pen?explain.cut the string with a pair of scissors3.what happens to the pen?what could have caused the pen's motion?explain.place a book on the top of a table4.is the book at rest, or in motion?explain.5.are there forces acting on the book?explain.

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Answers

2015-06-17T20:33:14+08:00
The pen is in motion.. There are forces acting on it, gravitational and normal force. The pen fell, idk.. The book is at rest. There are forces acting on a book, gravitational ( there are others but I don't remember, sorry)
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