Ch 1 Lecture.pptx - Statics Chapter 1 General Principles Dr Rakhsha Nasseripour PHY 239 What is Mechanics • An application of Newton’s Laws to

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Statics Chapter 1: General Principles Dr. Rakhsha Nasseripour PHY 239

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What is Mechanics? An application of Newton’s Laws to structures. The study of the state of rest or motion of objects subjected to forces.
What is Mechanics? Mechanics Rigid-Body Deformable- Body Fluid

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What is Mechanics? Mechanics Rigid-Body Deformable- Body Fluid Dynamics Statics
What is Statics? The branch of Mechanics concerned with bodies at rest and forces in equilibrium .

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Newton’s Laws of Motion 1. Inertia (If no net force, object at rest remain at rest and object in motion with constant velocity continues motion with constant velocity no change) 2. (If net force, object will experience acceleration change in motion/velocity) 3. Action/Reaction (Forces between two objects are equal and opposite directions.)
Newton’s Law of Universal Gravitation G = 6.673 x 10 -11 m 3 / kg-s 2 or Weight: W = mg g = 9.8 m/s^2 or g = 32.2 ft/s^2

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Idealizations/Assumptions Particle Point-like object with mass but no structure.

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