Answer:
4.04 s
Explanation:
From the question given above, the following data were obtained:
Height (h) = 80 m
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) =?
The time taken for the rock to get to the ground can be obtained as shown below:
h = ½gt²
80 = ½ × 9.8 × t²
80 = 4.9 × t²
Divide both side by 4.9
t² = 80/4.9
Take the square root of both side
t = √(80/4.9)
t = 4.04 s
Thus, it will take 4.04 s for the rock to get to the ground.
