PHYS 101 Essay #2

PHYS 101 Essay #2 - 9/25/07 PHYS 101-02 Newton's Laws, are...

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9/25/07 PHYS 101-02 Newton’s Laws, are they important in today’s world? The more pressing question is not if Newton’s Laws are important in today’s world; instead it is wondering how this question could possibly be asked. There are millions of examples of how each of Newton’s Laws of motion plays an essential role in the world around us. A common example of each law is given below. In general, Newton’s First Law of Motion states that an object is either at a state of rest or moves at a constant speed unless a force is exerted on the object. A very good modern-day application of this Law is when an object is in flight. There are four separate forces that act on a plane in flight – lift, weight, thrust, and drag [1]. As long as the plane is at a constant altitude, which it usually is, the forces of lift and weight cancel each other out. If an aircraft is also moving at constant speed, thrust and drag forces cancel as well. If the plane changes the thrust of the plane (an external force), drag and thrust are no
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PHYS 101 Essay #2 - 9/25/07 PHYS 101-02 Newton's Laws, are...

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