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Forces and Motion Science Fair Project

Galileo's Inclined Plane Experiment

Galileo's Inclined Plane Experiment | Science Fair Projects | STEM Projects
This science project will help you understand the concept of acceleration by replicating Galileo's famous inclined plane experiment. You'll use a piece of wooden moulding, a bronze ball, and a water clock to measure the time it takes for the ball to travel down the inclined plane.


The hypothesis is that the ball will travel down one quarter of the plane in half the time it takes to traverse the entire plane.

Method & Materials

You will construct an inclined plane using two 16-foot two by fours, sand and oil the groove to create a low-friction effect, and use a three-quarter inch steel ball bearing. You will also construct a water clock using a plastic bucket and plastic tubing.
You will need a piece of wooden moulding, a bronze ball, a water clock, two 16-foot two by fours, sandpaper, oil, a three-quarter inch steel ball bearing, a plastic bucket, and plastic tubing.


The experiment proved that Galileo could have attained the accuracy which he claimed for this experiment. If the ball's velocity remained the same, it would travel halfway down the plane in half the time. However, the ball traveled down one quarter of the plane in half the time it took to traverse the entire plane, demonstrating the concept of acceleration.

Why do this project?

This science project is interesting and unique because it replicates a famous experiment from Galileo's time, and it demonstrates the concept of acceleration in a fun and easy way.

Also Consider

Experiment variations to consider include using different materials for the inclined plane, such as marble or metal, and using different materials for the ball, such as glass or rubber.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

Related video

Hey there! Here are some awesome videos about this science project that we think you'll really like. They're not only super fun, but they'll also help you learn more about the science behind the project. So sit back, relax, and get ready to have some fun!!
Get ready to be impressed because this video explains how Galileo, without the use of clocks or modern tools, was able to prove the concept of acceleration. You'll be amazed by the clarity of the explanation and how Galileo's experiment revolutionized our understanding of motion.
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