Lecture08

Lecture08 - Chapter 9 Center of mass and linear momentum 1...

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Unformatted text preview: Chapter 9 Center of mass and linear momentum 1 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010 9.7. Conservation of Linear Momentum If no net external force acts on a system of particles, the total linear momentum, P, of the system cannot change. If the component of the net external force on a closed system is zero along an axis, then the component of the linear momentum of the system along that axis cannot change. P = const. for closed, isolated system 2 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010 x y F 1 F 2 F 3 9.8. Momentum and kinetic energy in collisions Elastic collision linear momentum and kinetic energy are conserved Inelastic collision linear momentum is conserved, kinetic energy is not Completely inelastic collision linear momentum is conserved, kinetic energy is not 1D, 2D, and 3D collisions 3 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010 9.9. Inelastic collisions in 1D Inelastic collision Completely inelastic collision Before collision After collision m 1 m 2 v 1i v 2i m 1 m 2 v 1f v 2f m 1 m 2 v 1i v 2i m 1 + m 2 v Before collision After collision Total kinetic energy decreased 4 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010 Total kinetic energy decreased 9.9. Inelastic collisions in 1D Inelastic collision Before collision After collision m 1 m 2 v 1i v 2i m 1 m 2 v 1f v 2f Total kinetic energy is not conserved 5 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010 p 1i + p 2i...
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This note was uploaded on 09/30/2010 for the course PHYS 2101 taught by Professor Grouptest during the Spring '07 term at LSU.

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Lecture08 - Chapter 9 Center of mass and linear momentum 1...

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