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h=45 m
g=10 m/s²
dit:t=?
jwb
h=vot-1/2gt²
45=0-5t²
-t²=45/-5
t²=9
t=√9
t=3 sekon
jadi waktu untuk mencapai ketanah adalah 3s.
1/2 * g * t^2 = h
1/2 * 10 * t^2= 45
5 * t^2 = 45
t^2 = 45/5
= 9
t = akar 9
= 3 s
*Maaf jika ada kesalahan*