help with these 5 physics questions will really be appreciated?

Question

1. suppose a free falling object is equipped w/ an odometer, would the readings of distance fallen for each sec indicate equal or different falling distances for successive seconds?

2. for a free falling object dropped from rest, what's the acceleration at the end of the 5th sec of fall? 10th sec?

3. by how much does the speed of a ball decrease each second while ascending when it's thrown up?
w/out air resistance, how much does it increase each sec while descending? how much time is required for rising compared to falling?

4. which ball will have a greater speed when it strikes the ground below? one thrown up or down with the same initial speed. [air resistance is negligible]

5. answer question 4 where air resistance is not negligible?

Answer 1

1. The readings, if graphed against time would show a parabola.

2. In the absence of air resistance or other force, acceleration is constant for such short periods of time.

3. v = v0 - at going up, v = at going down, if t=0 at the top of travel. With only gravity operating the pall takes the same time to fall as it does to rise.

4. Without air resistance they will both strike the ground with the same speed.

5. With air resistance the one thrown up will hit the ground with less speed than the one thrown down.