Momentum and Impulse


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  • Momentum and Impulse
    • Newton's Second Law (linear momentum)
      • momentum= mass x velocity (p=mv)
        • The linear momentum (p) is a vector with the same direction as the velocity of an object.
        • The change of momentum of an object is called impulse.
        • Rearranging the formula describing Newton’s second law results in the following expression
          • F?t (impulse) =m?v (change in momentum)
      • The rate of change of momentum of an object is proportional to the resultant force on it. In other words, the resultant force is proportional to the change of momentum per second.
    • Impulse and force-time graphs
      • Impulse is given by the area of a force-time graph.
    • Conservation of Linear Momentum
      • The law of conservation of linear momentum states that the sum of initial momentum is equal to the sum of final momentum in a closed system
        • m1u1+m2u2 = m1v1+m2v2
      • Newton's Second Law (linear momentum)
        • momentum= mass x velocity (p=mv)
          • The linear momentum (p) is a vector with the same direction as the velocity of an object.
          • The change of momentum of an object is called impulse.
          • Rearranging the formula describing Newton’s second law results in the following expression
            • F?t (impulse) =m?v (change in momentum)
        • The rate of change of momentum of an object is proportional to the resultant force on it. In other words, the resultant force is proportional to the change of momentum per second.
    • Collisions
      • A partially inelastic collision is one where the colliding objects move apart and have less energy after the collision than before
      • An elastic collision is one where is no loss of kinetic energy
      • A totally inelastic collision is one where the colliding objects stick together

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