Answer to Question #18150 in Mechanics | Relativity for Kristen
where u = 2.5 kg * 18 m/s / 20 kg = 2.25 m/s is the eventual velocity of the board.
For the clay ball: 2.5 kg * 10 m/s = (2.5 kg + 20 kg) * u,
where u = 2.5 kg * 10 m/s / (2.5 kg + 20 kg) = 1.11 m/s is the eventual velocity of the board with the ball stuck.
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