Edit made on August 16, 2013 by YuenNg at 19:48:55
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* A body continues in state of uniform motion (or rest) unless a force acts upon it.
Please note: Uniform motion is motion in a straight line with a constant speed i.e. constant velocity
* The force on a body is proportional to the rate of change of momentum
* The action on a body is equal and opposite to the reaction.