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Topic 5: Forces - Coggle Diagram

- - - - Total momentum is the same before and after a collision or explosion, provided no external forces act, e.g(friction)
      - Calculations
        
        A 1000kg car, X, travelling at a velocity of 30m/s, crashed into a stationary car, Y, with a mass of 1500kg.
        
        Calculate the velocity of the two cars after the collision
        
        v = p/m so 30,000/1000+1500 = 12m/s
        
        Calculate the momentum of X before the collision
        
        p = mv so 1000 x 30 = 30,000kgm/s
    - - F = (m(v-u)/t
  - - - The tendency for motion to remain unchanged
      - An object's inertial mass is how difficult it is to change the velocity of the object
- - - - Pressure(Pa) = density(kg/m^3) x gravitational(N/kg) x height(m)
      - p = pgh
- - - - Quanitiy with magnitude only such as mass and speed
    - - Quanitity with magnitude and direction such as momentum and weight