Answers

2014-06-19T19:25:01+08:00
Because there's no net force or unbalance force exists..but still there are forces acting on it such as GRAVITATIONAL FORCE,TENSION FORCE ,and its NORMAL FORCE.
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2014-06-19T19:28:09+08:00
It is because object at rest will not move unless an external force is applied to it.
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