Question

Amy drops a ball from an initial height of 30 feet above the ground. After how many seconds with a ball reach the ground? Roger answer to the nearest 10th of a second. (answer choices shown in picture)

Answer 1

1.4 is correct i dont want any credit i just want everyone to know that the answer above it right

Explanation:

i took a test and put 1.4 and it was right

Answer 2

Option 2. 1.4 seconds

Explanation:

As we know when a ball is dropped from a height then we apply the formula

`h=ut+(1)/(2)gt^(2)`

Here h = height from the ground

u = initial speed of the ball

t = time taken to reach the ground

g = acceleration due to gravity

Now we put the values of these parameters

h = 30 feet ≅ 9.144 met.

u = 0

g = 9.8 met/sec²

9.144 = 0 + 1/2×9.8×t²

9.144 = 4.9×t²

t² = 9.144÷4.9

t² = 1.87

t = 1.37 ≅ 1.4 seconds

Therefore option 2 is the answer.