Consider the same situation, but now let the initial speed v_0 of the first ball be given and treat the height h of the building as an unknown.

Consider the same situation, but now let the initial speed v_0 of the first ball be given and treat the height h of the building as an unknown. What must the height of the building be for both balls to reach the ground at the same time for v_0 = 8.75 m/s.

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