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A ball with the initial velocity u=3i+4ju = 3i + 4j collides with the smooth wall and rebounds with the final velocity v=2i3jv = 2i - 3j. Find the coefficient of restitution for the collision.


Your answer can be represented as e e = ab\dfrac{a}{b}, where a and b are coprime numbers.

Enter your answer as a+ba + b.


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This is a part of my set Aniket's Mechanics Challenges. (All level questions)
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