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Verified answer
H = 40 mVo = 0 (kelapa jatuh bebas tanpa kecepatan awal)
g = 10 m/s²
Waktu yang dibutuhkan kelapa sampai tiba di tanah adalah
h = Vot + 1/2gt²
40 = 0 + 1/2(10)(t²)
5t² = 40
t² = 40/5 = 8
t = √8 = √4 x √2
t = 2√2 sekon
Kecepatan benda sampai di tanah adalah
Vt = Vo + gt
Vt = 0 + 10(2√2)
Vt = 20√2 m/s