# This Is It

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CONTENTS |Topic |Page | |Newton's 1st Law: the Law of Inertia |2 | |Newton's 2nd Law: the Law of Proportionality |3 | |Newton's 3rd Law: the Law of Interaction |4-5 | |STUDENT WORKSHEET: Conversion…Force |6 | |STUDENT WORKSHEET: Conversion…Weight…show more content…
So if the carrier is moving at 34 mph and shuts its engines down, how far will it drift? A thousand feet? A mile? In turns out that the stopping distance (in a smooth sea) would be about 32 km (20 miles), if no active measures are taken to stop the forward motion of the carrier (such as reversing the engines). Video clips demonstrating inertia of large objects: 1. Speed 2: final scene of cruise ship crashing into dock. 2. The Lost World (Jurassic Park 3): similar scene towards end of film where ship crashes into dock. 3. Star Trek: TNG: "Nemesis": scene near end where Enterprise rams alien spacecraft. Newton's 2nd Law: the Law of Proportionality The acceleration of an object is directly proportional to the net force and inversely proportional to its mass. This is more readily expressed mathematically: Here, F = the force on the object (in units of Newtons), m = the object's mass (in kilograms), and a = the resulting acceleration (in units of meters per second per second, or meters/second2). Key points: 1. A force that results in an object accelerating is an unbalanced (or net) force. 2. The acceleration is always in the direction of the net force. Definitions: Force: a push or a pull on an object Mass: a measure of the amount of material in an object; a quantitative measure of