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Answer on Mechanics | Relativity Question for Ryan Dutton

Question #10607
An object is dropped from a platform 400 ft high. Ignoring wind resistance, how long will it take to reach the ground?
Expert's answer
Let's admit that 400 ft = 121.92 m. So,

t = √(2H/g) = √(2·121.92/9.8) ≈ 4.9881 s.

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