Force - Is a push or a pull, Newton - Unit of measurement of a force , Newton Balance - Apparatus used to measure the magnitude of a force , Mass - The amount of matter an object is made of, Weight - The downward force caused by gravity , Kilogram - Unit of measurement of mass , Newtons per kilogram - Unit of measurement of gravity, Jupiter - Planet with strongest gravity in solar system, Mercury - Planet with weakest gravity in solar system, Balanced force  - When two forces are equal and act in opposite directions , Unbalanced force - When forces are not equal , Friction - The force that acts in the opposite direction of objects in motion, Air resistance - Friction that objects feel when moving through the air , Water resistance - The friction that objects feel when moving through water , Streamlining - Changing the shape of an object to reduce air/water resistance ,

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