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Statement of a problem № 3148

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Two particles of mass m1 and m2 and velocities u1 and du2 (d > 0) make an elastic collision. If the initial kinetic energies of the two particles are equal, what should be the ratios u1/u2 and m1/m2 so that m1 will be at rest after the collision?

Solution:
Two particles of mass m1 and m2 and velocities u1 and du2 (d > 0) make an elasti

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