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All About Forces Force-01 (Contact Forces: Forces that result when the…

- - - - Action-Reaction Forces:
        identifying the two interacting objects and making two statements describing who is pushing on whom and in what direction
      - When a firefly hits a bus, while the sizes of the two objects are vastly different, the forces are actually still the same due to Newton's 3rd law.
  - - - Vector sum of all the forces that act upon an abject
        
        .
        
        a = Fnet / m
        or
        Fnet = m * a
        
        if the direction of acceleration is known, the direction of net force is known.
        
        If you need to find the mass to to solve for Fnet, use Fg = m * g where g= 9.8 (on earth)
      - Mass is inversely proportional to acceleration, acceleration is directly proportional to Net force, and mass is inversely proportional to net force.
        
        Using the proportions above:
        if acceleration is 12, mass is doubled and net force is tripled, the new acceleration is 18
  - - - The tendency of an object to resist changes in its state of motion varies with mass. Mass is: the amout on matter in an object that determines the amount of inertia in an object
        
        mass is commonly confused with weight which is the force of gravity on an object
- - - - Acceleration = 14.4 m/s/s (given)
        
        Fnet = 14.4 x 7.78
        Fnet = 112.032
        (Fnet = m x a)
        
        Fg = 7.78 x 9.8
        Fg = 76.244
        (Fg = m x g where g is a known variable of 9.80)
        
        Fnorm = 76.244
        ( Same as Fg )
        
        Ffric = .462 x 76.24
        Ffric = 35.25
        (Ffric = Fnorm x µ )
        
        Fapp = 112.032 + 35.35
        Fapp = 147.22
        ( Fapp = Fnet + Ffric)