Within Falling Objects
Why crumpled paper beats flat paper
A flat sheet and a crumpled sheet reveal why shape can matter more than mass in everyday falling.
On this page
- What changes when the paper is crumpled
- How surface area changes drag
- What this example teaches better than weight comparisons
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Introduction
A flat sheet of paper and the same sheet crumpled into a ball make one of the simplest demonstrations in physics. Drop them together and the crumpled paper usually reaches the ground first. Many people take this as proof that a more compact object falls faster because it is effectively “heavier”. In reality, both pieces have the same mass. What changes is how they move through the air.
The example matters because it exposes a common misunderstanding about falling objects. Everyday falls happen in an atmosphere, not in a vacuum. The crumpled paper falls faster mainly because its shape reduces air resistance, allowing gravity to dominate its motion more completely. The lesson is not that weight does not matter at all, but that shape and surface area can matter far more than people expect in ordinary conditions. [NASA Science]science.nasa.govthe apollo 15 hammer feather dropNASA ScienceThe Apollo 15 Hammer-Feather DropJul 20, 2015 —… hammer and a feather and dropped them at the same time. Because they were… [NASA]science.nasa.govthe apollo 15 hammer feather dropNASA ScienceThe Apollo 15 Hammer-Feather DropJul 20, 2015 —… hammer and a feather and dropped them at the same time. Because they were…
What changes when the paper is crumpled
The most important change is not the paper’s mass. A sheet of paper weighs the same before and after it is crumpled. Gravity pulls downward with essentially the same force in both cases.
What changes is the paper’s interaction with the air. A flat sheet spreads its mass over a large area. As it falls, it pushes against a broad volume of air, and the air pushes back. A crumpled ball presents a much smaller profile to the airflow. Less air has to be displaced, so the upward drag force is much smaller. [ingridscience.ca]ingridscience.caAir resistance | ingridscience.caThe crumpled plate has a smaller surface area, so less air is pushing up on it, so it is not slowed down… [wikipedia]WikipediaDrag (physicsDrag (physics This difference appears immediately in a simple drop test:
- Flat sheet: large exposed area, strong drag, slower descent.
- Crumpled sheet: smaller exposed area, weaker drag, faster descent.
- Same paper: same mass, same gravitational pull, different aerodynamic behaviour. [Brainly]brainly.phThe flat sheet falls more slowly.Read moreBrainlyDrop a sheet of paper and a crumpled paper at the same…13 Feb 2022 — When both papers are dropped at the same time, the crumple… [Gauth]gauthmath.comSolved: What causes a flat piece of paper to land on the…Explanation: The flat piece of paper lands after the crumpled piece because i…
The effect can be dramatic enough that people mistakenly attribute it to weight. In classroom demonstrations, students often assume the crumpled paper has somehow become heavier, even though no material has been added. The experiment works precisely because it isolates shape while keeping mass nearly unchanged. [ingridscience.ca]ingridscience.caAir resistance | ingridscience.caThe crumpled plate has a smaller surface area, so less air is pushing up on it, so it is not slowed down…
How surface area changes drag
Air resistance, also called drag, is a force that opposes motion through a fluid such as air. Drag increases as an object moves faster, but it also depends strongly on the object’s geometry and the area facing the airflow. [Wikipedia]WikipediaDrag (physicsDrag (physics
A flat sheet of paper acts almost like a tiny parachute. Its broad surface catches air, creating a substantial upward force that counteracts gravity. The paper therefore accelerates less than it would in free fall and often flutters, tumbles or glides as air currents interact with it.
A crumpled ball has a much smaller effective surface area. Air still resists its motion, but the resisting force is far weaker relative to its weight. Gravity therefore produces a larger net downward acceleration, and the paper reaches the ground sooner. [ingridscience.ca]ingridscience.caAir resistance | ingridscience.caThe crumpled plate has a smaller surface area, so less air is pushing up on it, so it is not slowed down… [Filo]askfilo.comwhy does a sheet of paper fall slower than a crumpled one 3337343734363338Why does a sheet of paper fall slower than a crumpled one?22 Jan 2026 — ### Why does a sheet of paper fall slower than a crumpled one?…
A useful comparison is a hand held out of a moving car window. With the palm facing forward, the air pushes strongly against it. Turn the hand edge-on and the force drops sharply. The mass of the hand has not changed; only its shape relative to the airflow has. The paper experiment follows the same principle. [Reddit]reddit.comELI5:Why does a sheet of paper fall slowly but if we foldMore surface area on the flat sheet means that it has more air pushing up against it keeping it in the air. It's…Read more…
Another way to think about it is through terminal velocity, the speed at which drag becomes large enough to balance the object’s weight. The flat sheet reaches a low terminal velocity because drag builds quickly. The crumpled paper reaches a much higher terminal velocity because drag remains comparatively small. As a result, the crumpled paper can continue accelerating for longer and move faster throughout the fall. [Wikipedia]WikipediaDrag (physicsDrag (physics
Why the experiment works so well
Many comparisons between heavy and light objects accidentally change several variables at once. A stone differs from a leaf in mass, density, shape and surface area. That makes it harder to see what is really causing the difference.
The paper demonstration removes most of that confusion. The material is identical. The mass is essentially identical. The only major change is shape. That makes the role of air resistance much easier to recognise.
A useful extension is to place the flat sheet on top of a book and drop both together. The book shields the paper from much of the air resistance, and the paper falls almost as quickly as the book. The result surprises many people because it reveals that the slow fall was caused mainly by the surrounding air rather than by some special property of the paper itself. [Scribd]scribd.comScribdWorksheet - 02 - 05 B | PDF | Mass | ForceThe objects dropped were a book with paper, the paper alone, and crumpled paper. The crum…
The experiment also helps explain why parachutes work, why leaves drift, and why streamlined vehicles are designed to reduce drag. Across all these cases, controlling the interaction between an object and the air can matter more than changing the object’s weight.
What this example teaches better than weight comparisons
The crumpled-paper demonstration corrects a misconception that ordinary experience seems to support. People really do observe some objects falling faster than others. The mistake is assuming that mass is always the decisive factor.
The deeper lesson is that falling objects are influenced by more than gravity. In everyday conditions, air resistance can dramatically alter motion. A large, light object can be slowed far more than a compact object of the same mass. [ingridscience.ca]ingridscience.caAir resistance | ingridscience.caThe crumpled plate has a smaller surface area, so less air is pushing up on it, so it is not slowed down…
The strongest evidence comes from situations where air resistance is removed. On the Moon, astronaut David Scott famously dropped a hammer and a feather together. With essentially no atmosphere to create drag, they struck the surface at the same time. The demonstration showed that the dramatic differences seen on Earth are largely consequences of air resistance rather than weight alone. [NASA Science]science.nasa.govthe apollo 15 hammer feather dropNASA ScienceThe Apollo 15 Hammer-Feather DropJul 20, 2015 —… hammer and a feather and dropped them at the same time. Because they were…
That is why crumpled paper beats flat paper. The paper does not gain extra gravity when it is crushed. It simply stops acting like a miniature parachute. Once less air is pushing back, the fall begins to resemble the behaviour that physics predicts for objects under gravity alone. [NASA Science]science.nasa.govthe apollo 15 hammer feather dropNASA ScienceThe Apollo 15 Hammer-Feather DropJul 20, 2015 —… hammer and a feather and dropped them at the same time. Because they were… [Filo]askfilo.comwhy does a sheet of paper fall slower than a crumpled one 3337343734363338Why does a sheet of paper fall slower than a crumpled one?22 Jan 2026 — ### Why does a sheet of paper fall slower than a crumpled one?…
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Endnotes
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Source: science.nasa.gov
Title: the apollo 15 hammer feather drop
Link: https://science.nasa.gov/resource/the-apollo-15-hammer-feather-drop/Source snippet
NASA ScienceThe Apollo 15 Hammer-Feather DropJul 20, 2015 —... hammer and a feather and dropped them at the same time. Because they were...
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Source: nasa.gov
Link: https://www.nasa.gov/specials/apollo50th/missions.htmlSource snippet
he ground at the same time, proving...Read more...
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Source: ingridscience.ca
Link: https://www.ingridscience.ca/node/402Source snippet
Air resistance | ingridscience.caThe crumpled plate has a smaller surface area, so less air is pushing up on it, so it is not slowed down...
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Source: Wikipedia
Title: Drag (physics)
Link: https://en.wikipedia.org/wiki/Drag_%28physics%29 -
Source: brainly.ph
Title: The flat sheet falls more slowly.Read more
Link: https://brainly.ph/question/25276031Source snippet
BrainlyDrop a sheet of paper and a crumpled paper at the same...13 Feb 2022 — When both papers are dropped at the same time, the crumple...
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Source: reddit.com
Title: ELI5:Why does a sheet of paper fall slowly but if we fold
Link: https://www.reddit.com/r/explainlikeimfive/comments/5fcfkf/eli5why_does_a_sheet_of_paper_fall_slowly_but_if/Source snippet
More surface area on the flat sheet means that it has more air pushing up against it keeping it in the air. It's...Read more...
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Source: scribd.com
Link: https://www.scribd.com/document/695952367/worksheet-02-05-bSource snippet
ScribdWorksheet - 02 - 05 B | PDF | Mass | ForceThe objects dropped were a book with paper, the paper alone, and crumpled paper. The crum...
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Source: nasa.gov
Title: A13 Press Kit
Link: https://www.nasa.gov/wp-content/uploads/static/apollo50th/pdf/A13_PressKit.pdf -
Source: pwg.gsfc.nasa.gov
Title: Star FAQ4
Link: https://pwg.gsfc.nasa.gov/stargaze/StarFAQ4.htmSource snippet
nasa.gov"Get a Straight Answer"Sep 17, 2004 — Besides the testimony of participants (including New Mexico's senator Harrison Schmidt), we...
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Source: ntrs.nasa.gov
Link: https://ntrs.nasa.gov/api/citations/19980237687/downloads/19980237687.pdfSource snippet
for Spacewalkingby GL Vogt · 1998 · Cited by 3 — Orbiting above Earth it has no weight at all. It does, however, retain its mass in space...
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Source: ntrs.nasa.gov
Link: https://ntrs.nasa.gov/api/citations/19740027152/downloads/19740027152.pdfSource snippet
planning for utilization of space shuttle (ed-pluss)by HA Engle · 1974 · Cited by 1 — During the course of Apollo 15 lunar surface experi...
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Source: nasa.gov
Title: A15 Press Kit
Link: https://www.nasa.gov/wp-content/uploads/static/apollo50th/pdf/A15_PressKit.pdfSource snippet
Apollo 15 Press KitJul 15, 1971 — Heat flow experiments, design and data analysis are the responsibility of Dr. Marcus Langseth of the La...
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Source: ntrs.nasa.gov
Link: https://ntrs.nasa.gov/api/citations/19960014812/downloads/19960014812.pdfSource snippet
THE UNKNOWNThe idea for creating a reference work that would include documents seminal to the evolution of the civilian space program of...
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Source: ntrs.nasa.gov
Link: https://ntrs.nasa.gov/api/citations/19850025199/downloads/19850025199.pdfSource snippet
nasa.gov/, 19th Aerospace Mechani SymposiumThe purpose of the symposium was to provide a forum for the interchange of information among t...
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Source: nasa.gov
Title: A12 Press Kit
Link: https://www.nasa.gov/wp-content/uploads/static/apollo50th/pdf/A12_PressKit.pdf -
Source: reddit.com
Link: https://www.reddit.com/r/space/comments/yvtmy1/the_hammer_and_feather_experiment_on_the_moon/Source snippet
The Hammer and Feather Experiment on the moonSame principle when you drop something, air will slow things down. Remove the air and they w...
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Source: reddit.com
Link: https://www.reddit.com/r/BeAmazed/comments/16vie0n/bowling_ball_and_a_feather_fall_al_exactly_the/Source snippet
slowly just like the feather...
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Source: gauthmath.com
Link: https://www.gauthmath.com/solution/1841004218568706/What-causes-a-flat-piece-of-paper-to-land-on-the-ground-after-the-paper-that-wasSource snippet
Solved: What causes a flat piece of paper to land on the...Explanation: The flat piece of paper lands after the crumpled piece because i...
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Source: gauthmath.com
Link: https://www.gauthmath.com/solution/1810102676680709/A-crumpled-piece-of-paper-hits-the-ground-before-a-flat-sheet-of-paper-because-tSource snippet
Therefore, even though gravity acts equally on both, the reduced air resistance on the...Read more...
Additional References
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Source: youtube.com
Link: https://www.youtube.com/watch?v=EcGxFvOoUTUSource snippet
Bowling ball and feather drop with and without air resistanceProfessor Brian Cox visited NASA's Space Power Facility in Ohio to examine w...
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Source: askfilo.com
Title: why does a sheet of paper fall slower than a crumpled one 3337343734363338
Link: https://askfilo.com/user-question-answers-smart-solutions/why-does-a-sheet-of-paper-fall-slower-than-a-crumpled-one-3337343734363338Source snippet
Why does a sheet of paper fall slower than a crumpled one?22 Jan 2026 — ### Why does a sheet of paper fall slower than a crumpled one?...
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Source: thekidshouldseethis.com
Title: the hammer feather drop in the worlds biggest vacuum chamber
Link: https://thekidshouldseethis.com/post/the-hammer-feather-drop-in-the-worlds-biggest-vacuum-chamberSource snippet
How does a hammer, brick, or bowling ball move in comparison to the feathers when you remove any air resistance? Watch. Bowling...Read more...
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Source: instagram.com
Link: https://www.instagram.com/reel/DOAi2mWkfEM/Source snippet
r resistance. As the object speeds up, air resistance increases...
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Source: physics.stackexchange.com
Title: (3 answers) Closed 4 years
Link: https://physics.stackexchange.com/questions/681278/why-does-a-crumpled-paper-fall-down-faster-than-a-flat-paperSource snippet
Physics Stack ExchangeWhy does a crumpled paper fall down faster than a flat...7 Dec 2021 — This question already has answers here: Why...
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Source: youtube.com
Title: Why does a crumpled piece of paper fall faster than a flat sheet?
Link: https://www.youtube.com/watch?v=XW92j57a6yQSource snippet
Falling Paper Experiment: Air Resistance...
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Source: youtube.com
Title: Falling Paper Experiment: Air Resistance
Link: https://www.youtube.com/watch?v=o2dD3w0_y74Source snippet
Does Mass Affect Falling Speed? (The Feather and the Hammer Experiment)...
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Source: youtube.com
Title: Air Resistance and Falling Objects
Link: https://www.youtube.com/watch?v=g893sJ4aQ9gSource snippet
Why things fall at different speeds - The Physics of Drag...
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Source: youtube.com
Title: Does Mass Affect Falling Speed? (The Feather and the Hammer Experiment)
Link: https://www.youtube.com/watch?v=E43-CfUKEgsSource snippet
Air Resistance and Falling Objects...
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Source: youtube.com
Title: Why things fall at different speeds
Link: https://www.youtube.com/watch?v=zGgTj2-uS8M
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