Question

Find the mean time for each ramp length
Mean 3.6s

Find the ball's acceleration for each mean time using the equation below where D is distance or ramp length and T is time
Acceleration=2D/T^2

1.5m(Distance) Use 3.6

Answer 1

a = 2 (1.5)/3.6^2

Answer 2

Go back and read my reply about the bottles moving at constant velocity !!!!

Answer 3

http://www.jiskha.com/display.cgi?id=1412288943