Galileo's Falling Bodies Experiment

One of the most influential investigations in the history of physics.

The Question

Do heavier objects fall faster than lighter objects?

For centuries, many people accepted the view that heavier objects naturally fall faster than lighter ones. Galileo challenged this assumption and began investigating how objects move under the influence of gravity.

Historical Context

A popular account states that Galileo demonstrated his ideas by dropping objects from the Leaning Tower of Pisa. Whether this specific event occurred exactly as described remains uncertain, but Galileo's investigations of falling bodies fundamentally changed our understanding of motion.

His work laid the foundations for later developments in classical mechanics.

The Experiment

Two objects with different masses are released from the same height at the same time.

If air resistance is small, both objects should reach the ground at nearly the same moment despite their different masses.

Perform It Yourself

Choose two objects with noticeably different masses but similar shapes.

Examples:

• Two balls of different mass

• Two stones of similar size

• Two metal spheres

Release them simultaneously from the same height and observe their motion.

For greater accuracy, record the fall using a smartphone camera and review the video frame by frame.

Expected Observation

The objects should reach the ground at nearly the same time.

Small differences may appear because of air resistance, release timing, or measurement uncertainty.

Record an Observation

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Record Observation