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A cannon is rolling to the right at a speed of 0.50 c. In its own...

A cannon is rolling to the right at a speed of 0.50 c. In its own frame, it fires a 8.5 kg cannonball to the right at a speed of 0.72 c . Let A be the value of the cannonball’s momentum in the frame of the ground according to classical physics; let B be the same momentum according to special relativity. Which of the following is correct?

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