Materials and Safety Guidelines:

For this experiment you will need to drop objects that are the same shape but of different masses. We recommend you use two water bottles, one that is filled with water and one that is empty. However, you may get creative and find some other objects that will fit the criteria (i.e. different balls)! 

You might want to stand on something for extra height and fun while you are dropping your objects. You may use a steady chair or stool. You could also just stand up 🙂

Please conduct the experiment with parental supervision and if possible, we recommend you do this outside or in an area with lots of empty space. If you must conduct this experiment inside, make sure your floor is protected in case of a spill.


The Science Behind This Experiment:

Gravity = the force by which a planet or other body draws objects toward its center

Air Resistance = the force that is caused by air. The force acts in the opposite direction to an object moving through the air.

Force =the push or pull on an object with mass that causes it to change velocity (to accelerate/go faster)

It is important to note that the results of Galilee’s experiments may be slightly exaggerated. In the real world, there are external factors that impact the motion of objects like air resistance so the objects might not land on the ground at the exact same time. However, it is true that in a vacuum (an area with no air resistance) objects of different masses will fall at the same rate because the force of gravity acting upon them is the same.


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