One way to get better results would be to increase the time of fall. If you wish to increase the time of fall by a factor of three, what height building will you need compared to the height of the building you used? (Hint: Consider the equation you used in step 13 to calculate the acceleration of each of the following objects.)

Explanation:

If an object is made to fall by a height h and t be the time taken by him to touch the ground

s = ut + 1/2 gt²

h = 1/2 gt² where initial velocity is zero .

If time is required to be made 3 times , so time of fall = 3 t

new height required

H = 1/2 g ( 3t )²

= 1 / 2 x 9 x t²

= 9 h

So new height will be 9 times the old height .