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The Impulse

# The Impulse - momentum In addition both are related to...

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The Impulse-Momentum Theorem The second equation we can generate from our definition of momentum comes from our equations for impulse. Recall that: J = mv f - mv o Substituting our expression for momentum, we find that: J = p f - p o = Δp This equation is known as the Impulse-Momentum Theorem. Stated verbally, an impulse given to a particle causes a change in momentum of that particle. Keeping this equation in mind, momentum is conceptually quite similar to kinetic energy. Both quantities are defined based on concepts dealing with force: kinetic energy is defined by work, and momentum is defined by impulse. Just as a net work causes a change in kinetic energy, a net impulse causes a change
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Unformatted text preview: momentum. In addition, both are related to velocity in some way. In fact, combining the two equations K = mv 2 and p = mv we can see that: K = This simple equation can be quite convenient for relating the two different concepts. This section, dealing exclusively with the momentum of a single particle, might seem out of place after a section on systems of particles. However, when we combine the definition of momentum with our knowledge of systems of particles, we can generate a powerful conservation law: the conservation of momentum....
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