Answer:
-3413 ft/s2
Explanation:
We need to know the velocity with which he landed on the snow.
He 'dropped' from 512 feet. This is the displacement. His initial velocity is 0 and the acceleration of gravity is 32 ft/s2.
We use the equation of mition
v and u are the initial and final velocities, a is the acceleration and s is the displacement. Putting the appropriate values
This is the final velocity of the fall and becomes the initial velocity as he goes into the snow.
In this second motion, his final velocity is 0 because he stops after a displacement of 4.8 ft. We use the same equation of motion but with different values. This time, , v = 0 and s = 4.8 ft.
Note that this is negative because it was a deceleration, that is, his velocity was decreasing.