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Terminology of Physics (Newton's three Laws (1: objects will remain in…

- - - - how fast is it going?
        
        m/s
        
        i.e. direction not involved, how long does it take to get from point a to point b?
        
        s=d/t
      - which is also
        
        an acceleraion (a change in speed)
        
        i.e. speed up, slow down, stop, change direction
        
        acceleration is caused by a FORCE
        
        push
        
        or a pull
        
        and the amount of force determines the MOMENTUM
        
        (how hard is it to stop something?)
        
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        mass times momentum
        
        and mass is how much "stuff" there is (measure of the amount of material in an object)
        
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        volume is the quantity of a substance (measure of the physical space it occupies)
        
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        force equals rate of change in momentum
        
        speed determines momentum
    - - turning
      - going backwards, forwards, stopping
- - - - momentum of an object can only change by an outside source
        
        the rate of change in the objects velocity is called acceleration
        
        the harder you push an object, the faster it will go
        
        acceleration is proportional to the force being applied to it
        
        a pen pushed at the same acceleration rate as a text book would go much faster because a pen has less mass