If a stone with the original velocity of 0 is falling from a ledge and takes 8 seconds to hit the ground, what is the the final velocity of the stone?

To answer this question, we will use the equation of motion:

v = u + at where:

v is the final velocity that we need to calculate

u is the initial velocity of the stone = 0 m/sec

a is the acceleration = 9.8 m/sec^2

t is the time = 8 seconds

Substitute in the above equation to get the final velocity as follows:

v = 0 + 9.8 (8) = 78.4 m/sec

Based on the above calculations:

final velocity of the stone = 78.4 m/sec