YP Collisions simulates a two-dimensional
collision between two particles. The user chooses
the mass, the initial velocity (magnitude and
direction), and the coefficient of restitution. An
animation shows the motions of the particles
before and after the collision, and the following
information is displayed: final velocity of each
particle, impulse of each particle, momentum
(initial and final), percentage of conserved
momentum, kinetic energy, percentage of
conserved energy. It is also p ossible to view the
force exerted on each particle during the collision.

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