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The motion of a space shuttle breaking through Earthfs atmosphere can be explained by physical principals discovered over three hundred years ago by Sir Isaac Newton. He developed three laws of motion which many examples are demonstrated throughout this movie. Sir Isaac Newtonfs three laws of motion are ¨ I. An object in motion tends to stay in motion, an object at rest tends to stay at rest, unless the object is acted upon by an outside force. II. The acceleration of an object acted on by an unbalanced force is inversely proportional to mass. | Fnet = Mass ~ Acceleration | III. Every action has an equal or opposite reaction. Some examples of Newtonfs laws are when they reach the speed for orbit around the earth, gas molecules pushing the shuttle forward in space, and the force needed to escape Earthfs atmosphere. When the space shuttle reached the critical speed for orbit aroun