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we assume that g = 9.8 m /s²
V1 =8 m/s v2 = ? g = 9.8 m /s² height = 30 m Applying the equation v2² -v1² = 2gx v2² - 8² = 2 × 9.8 × 30 v² = 652 m/s v =25.53 m /s So the time is v2 - v1 / g t= 25.53 - 8 /9.8 t = 1.788 seconds
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