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Two particles with masses m and 4m are moving toward each other along the x axis...

Two particles with masses m and 4m are moving toward each other along the x axis with the same initial speeds vi. Particle m is traveling to the left, while particle 4m is traveling to the right. They undergo an elastic, glancing collision such that particle m is moving in the negative y direction after the collision at a right angle from its initial direction.

(a) Find the final speeds of the two particles in terms of vi.

particle m__________ ✕ vi
particle 4m _________ ✕ vi


(b) What is the angle θ at which the particle 4m is scattered?
°________ degrees

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