A one-dimensional perfectly elastic collision occurs between two masses on a frictionless surface. The initial kinetic...
A one-dimensional perfectly elastic collision occurs between two masses on a frictionless surface. The initial kinetic energies of the masses were 10 J and 5 J. After the collision the kinetic energy of one of the masses is 20 J. What is the kinetic energy of the other mass?
Homework Answers
For perfectly elastic collision, total kinetic energy of the system before collision is equal to the total kinetic energy of the system after collision.
Above problem is set in such a fashion, where after applying conservation of toatl kinetic energy is applied, one of the particle will end up with negative kinetic energy(-5 J) which entitles that the particles velocity is imaginery( which is absurd). In classical physics kinetic energy is a positively defined function i.e it cannot have negative value, in quatum though negative kinetic energy is defined in case of imaginery momenta of the body, but i dont suppose this is a problem of quantum tunnelling.
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