dock is formed by completely submerging a metal plate and attaching it to an underwater wall. The exposed side of the metal plate faces the ocean and is subjected to the flow of water induced by tides. The plate is 2.5m in height and 20m in width. How much force will the water exert on the metal plate if the current has a velocity of v=3ms at maximum tidal flow?

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!