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Unformatted text preview: No 6. Write an equation for kinetic energy in terms of momentum: All energy is conserved, strictly and absolutely. Momemtum = Mass * velocity. Kinetic Energy = * mass * Velocity^2 or Momentum^2 / 2m 7. When a cue ball hits another billiard ball, what is special about the angle between the balls after colliding? The three vectors of the initial momentum and the resulting momentums create a triangle. When one billiard ball strikes another, they come off at a right angle to each other. The only exception would be if the balls are hit straight on, then the first ball will come to a stop and transfer all its energy to the second ball. 8. For what is Descartes famous ? Analytic geometry and symbolic algebra, which changed the course of mathematics forever. The Cartesian coordinate system is named after him. 9. Why are collisions so important to physicists? Creating a collision is the only way to learn about subatomic particles and the nuclei of atoms....
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