The time to hit the ground is 1.9 seconds
How to determine the time?
The height equation is given as:
d = -16t^2 + h0
A stone thrown from 60 feet has an initial height of 60.
This means that:
h0 = 60
So, we have:
d = -16t^2 + 60
When the stone hits the ground, d = 0
So, we have:
-16t^2 + 60 = 0
Evaluate the like terms
-16t^2 = -60
Divide by -16
t^2 = 3.75
Evaluate the square root
t = 1.9
Hence, the time to hit the ground is 1.9 seconds
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