Answers

2014-06-18T20:00:51+08:00
If the string holding the pen was cut,the pen will fall.This is due to the force of gravity.
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2014-06-18T20:01:55+08:00
What happen to the pen?   it fell to the ground.
what could have caused?  the gravity from the earth and the force

hope it helps

-ninah :)



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