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Chapter2.Gravity and Motion

Chapter2.Gravity and Motion - Gravity and Motion Chapter 2...

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1 Gravity and Motion Chapter 2
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2 Isaac Newton formulated three laws of motion and the law of gravitation – these laws describe the motion of our physical world
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3 Characteristics of Forces A force is a push or a pull on an object. Force is a vector ; has both magnitude and direction. A force requires an agent; something does the pushing or pulling. A force is either a contact force or a long - range force. Gravity and electromagnetic fields are examples of the latter.
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4 Types of Forces Weight Spring force Tension Normal force Friction Drag Thrust
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5 4 Fundamental Forces Long Range : (1) gravity, (2) electromagnetic Short Range : (3) Strong and (4) Weak Nuclear Forces
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6 Mass (m) Mass has the property of inertia, resistance to changes in motion . It is a measure of the quantity of matter it contains. UNITS : kilograms, grams, slugs (English) Under a standard gravity, 1 kilogram = 2.2 pounds.
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7 Weight, w Weight is a force.
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Chapter2.Gravity and Motion - Gravity and Motion Chapter 2...

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