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A battleship is moving forward at 20m/s. A cannonball is fired backwards from the ship at 100m/s relative to the ship. if the forward is positive, what is the velocity of a cannonball for an observer on a stationary ship next to the battleship?

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1. A battleship is moving forward at 20m/s. A cannonball is fired backwards from the ship at 100m/s relative to the ship. if the forward is positive, what is the velocity of a cannonball for an observer on a stationary ship next to the battleship?





 
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