Gravity Experiment - What Goes Up Must Come Down

Yesterday I carried out an investigation on gravity, what goes up must come down. I tested out seven different materials and dropped them at the same height. On my database sheet I predicted which would hit the floor first from the same height.

Once I wrote down my hypothesis I tested it out. I first dropped a small marble and a ping pong ball. I guessed that the marble would hit the ground first but the ping pong ball was actually first. The materials I used were a small marble, a ping pong ball, a rubber, pencil, paper clip, a flat piece of paper, a feather and a crumpled piece of paper from the flat piece of paper.

If you drop two different objects at different heights it changes the affect of the outcome. But it wouldn’t change an affect if they were dropped from the same height because usually the heavier object would land to the ground faster.

The table below shows my results

Object Dropped		Which hit the ground first? (guess)	Which actually hit the ground first?
Marble	Ping pong ball	Marble	Ping pong ball
Rubber	Paper Clip	Rubber	Rubber
Marble	Pencil	Marble	Pencil
Flat Paper	Feather	Flat Paper	Feather
Crumbled Paper	Feather	Crumbled Paper	Crumbled Paper
Feather	Paper Clip	Paper Clip	Paper Clip
			3/6 correct