Lesson 5 - Free Fall Motion

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15 Terms

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gravity

an attractive force that acts on any two objects with mass

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free fall

an object being acted upon solely by the force of gravity

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free falling objects do not…

encounter resistance

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g =

9.8m/s²

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object being thrown upward

  • positive vertical velocity

  • negative downward acceleration

  • slows until v=0

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object coming down

  • acceleration is still downward

  • velocity is now negative

  • acceleration is negative (a does not equal zero)

  • speed increases

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mass

amount of MATTER in an object

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weight

measure of GRAVITATIONAL ATTRACTION of an object

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gravity depends on…

the mass of objects and their distance from each other

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gravitational force follows a…

inverse-squared relationship

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greater mass =

greater gravitational force

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greater distance =

weaker gravitational force

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Law of Universal Gravitation

every object in the universe is attracted to one another by a force

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air resistance

caused by the friction between a falling object and air particles

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the quantity of air resistance depends on…

the shape and speed of a falling object