A ball falling from rest is located 45m below its starting point 3.0s later. Assuming that its acceleration is uniform, what is its value?
I know that the appropriate equation is
∆d = vi∆t + 1/2a∆t^2, but I do not understand why.
I know that the appropriate equation is
∆d = vi∆t + 1/2a∆t^2, but I do not understand why.
1 Answer
Oct 21, 2016
The acceleration is
Explanation:
Let the acceleration be
Then we can use the equation
So
Aussuming that the downward direction is positive
So
This is