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one-dimensional movement exercise: Two balls are dropped in a vacuum from the same height, but at...

one-dimensional movement exercise:

Two balls are dropped in a vacuum from the same height, but at different times; The second ball hits the ground 1.35 seconds after the first hits the ground.
A. from the above information, deduce an expression that allows you to find the difference between your heights (∆h = h2-h1)

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