AP1200_Ch1_Mechanics-2007 - AP1200 Foundation Physics...

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AP1200 Foundation Physics Limited wisdom and incorrect predictions: “Heavier-than-air flying machines are impossible.” -- Lord Kelvin, President, Royal Society, London, 1895. "Airplanes are interesting toys but of no military value." -- Maréchal Ferdinand Foch, Professor of Strategy, France. “Professor Goddard does not know the relation between action and reaction and the need to have something better than a vacuum against which to react. He seems to lack the basic knowledge taught daily in high schools.” -- 1921 New York Times editorial about Robert Goddard's revolutionary rocket work. "Drill for oil? You mean drill into the ground to try and find oil? You're crazy." -- Drillers who Edwin L. Drake asked to help him drill for oil in 1859. "If I had thought about it, I wouldn't have done the experiment. The literature was full of examples that said you can't do this." -- Spencer Silver on the work that led to the unique adhesives for 3-M "Post-it" notepads. Chapter 1: Mechanics z Velocity and acceleration z Newton’s laws of motion z Forces & torques z Kinetic and potential energy z Linear motion z Gravitational forces 1.1 Vectors Vectors are commonly used in Physics and will be introduced in this course. 1.1.1 Definitions A vector quantity is a quantity that has both a magnitude and a direction . In contrast, a scalar quantity has magnitude only and no direction. Some examples: Vectors Scalars Displacement Distance Velocity Speed Acceleration mass Force Time 1
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