When an object fall, the force of gravity pulls it to the earth with an acceleration, g=9.8 m/s². The distance d in meters that the object falls is equal to 1/2gt², where g is acceleration due to gravity and t is the time in second.

A ball or any object mentioned previously is dropped from a dining table. Use the formula d=1/2gt² to calculate the distance

1. Create three shelves to collect the object after it's falling from a dining table, the shelves placed down in a different distance from the top of the dining table as shown in figure (red, blue, and green) distances, record the time that the object reached each shelf ( see the table below.
2. Calculate the distances by applying the equation d=1/2gt².
3. Calculate the velocity v= d/t