With respect to what bodies are the passengers on the deck of the river ship in motion?

According to the terms of the problem, the passengers stand motionless on the deck of the ship. Also, we take the deck of the ship for the reporting system. The river and the deck of the ship move at the same speed and in the same direction, so this option is eliminated. The ship’s match is also located on the ship itself and is stationary relative to the deck.



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