Answer to Question #15518 in Mechanics | Relativity for Rhyse Vivens
H = gt²/2 = 9.8[m/s²]*(4[s])²/2 = 78.4 metres.
So, the time needed to fall 78.4 metres on the planet X is
T = √(2*78.4[m]/(9.8/5[m/s²])) ≈ 17.53 seconds.
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