If a 75-kg skater starts his skate at 8.0m, at his lowest point (height = 0), what is his velocity?

Answer 1

Is this some kind of downhill skating?
Are you supposed to ignore friction?
Is he starting the skate with zero velocity?

This is a pretty far-fetched question. I suppose they want you to use conservation of energy.

That will result in V(final) = sqrt(2gH)
where H = 8 m.

The weight won't make a difference.