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OpenStudy (anonymous):
Object A has of mass 7.20 kilograms, and object B has a mass of 5.75 kilograms. The two objects move along a straight line toward each other with velocities +2.00 meters/second and -1.30 meters/second respectively. What is the total kinetic energy of the objects after the collision, if the collision is perfectly elastic?
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OpenStudy (souvik):
in perfectly elastic collision kinetic energy is conserved.. so the total kinetic energy before collision=the total kinetic energy after the collision... so find the total kinetic energy before collision...
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