Physics

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A 1.4 kg ball is thrown upwards off the side of a building with a spped of 5.8 m/s and falls into an ocean 16 meters below. Once the ball hits the water it travels a depth of 1.4m then floats to the surface. Assuming the acceleration of the ball when it hits the water is constant calculate the total time it takes from the time the ball is thrown to the time it "pops" out of the water. What is the average force the water exerts on the ball while it is sinking?

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