Unformatted text preview: rce described in Figure 1. This average force is the constant force delivering the same impulse to the object in the time interval Δt as
the actual timevarying force. We can then write the impulsemomentum theorem as ∆ ∆ (9) 2.2 Conservation of Momentum
When two bodies interact with one another in the absence of any net external influence, or force,
the loss in the momentum of one body equals the gain in momentum of the second body. Or, stating this
differently, the total change in momentum of the two bodies is zero. We can, therefore, think of a
collision as the process in which momentum is transferred from one body to another, with no change in
the total momentum of the system. Thus, if p1 is the momentum of body 1 and p2 is the momentum of
body 2, the one body interacting with the other in the absence of net external forces, the total momentum
of the system, is constant. In other words: If no net external force acts on a system of particles, the
total linear momentum of the system cannot change. This result is called the law of con...
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 Fall '09
 Energy, Force, Kinetic Energy, Momentum, Light, Conservation of Momentum

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