Answers

2016-06-25T19:48:13+08:00
Hang a pen by a piece of string. 1.Is the pen at rest or in motion,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 scissors
3.what happens to the pen?what could have caused the pen's motion?explain.

place a book on the top of a table
4.is the book at rest, or in motion?explain.
5.are there forces acting on the book?explain.

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2016-06-26T14:22:51+08:00
Force of Gravity is acting on the hanging pen.
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