a helicopter is ascending vertically with a speed of 5.20m/s. at a high of 125m above the earth, a package i dropped from a window. how much time

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a helicopter is ascending vertically with a speed of 5.20m/s. at a high of 125m above the earth, a package i dropped from a window. how much time does it take for the package to reach the graund ? (Hint: the package’s initial speed equals the helicopter’s.)