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Verified answer
A. V = akar 2GH20 = akar 2 (10) H
20 = akar 20h
Keduanya di kuadratkan
400=20h
H = 400/20 = 20 m
B. T = akar2h/g
= akar 2.20/10
= akar 40/10
= akar 4
T = 2 sekon
Supaya tidak bingung :
H = tinggi (dalam m)
T = detik (dalam sekon)
V = kecepatan (dalam m/sekon kuadrat)