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a company releases an elevator from a 4 story building to fall freely. Each floor has an average height of 3.5 meters , elevator falls

a company releases an elevator from a 4 story building to fall freely. Each floor has an average height of 3.5 meters , elevator falls freely until it reaches the ground. a) what is the final velocity of the elevator when it reaches the ground? b) what is the elapsed time taken by the elevator to reach the ground from the point when it starts falling freely?

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