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free fall

Free-Falling Objects
Image: iStockphoto.com/AJ_Mascari

Free-Falling Objects

In Newtonian physics, a free-falling object is an object falling only under the influence of gravity, with no other force acting upon it. All free-falling objects on Earth accelerate downwards at a the same rate.

This might seem counterintuitive. You might expect that heavier objects would fall faster. Not so fast! These resources get the drop on free-fall science.

MindBites
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Quiz Zone: Acceleration

Quiz Zone: Acceleration

If you see someone firing a gun, what do you want to know? How fast the bullet is accelerating, of course. With real-world examples, you can test your knowledge of acceleration here. More...

Interactive
PhysicsLessons.com
Introduction to Free Fall

Introduction to Free Fall

A free-falling object is an object falling with only the force of gravity acting upon it. Read a brief introduction to this concept here. More...

Article
The Physics Classroom
Behind the Supersonic Stratospheric Skydive

Behind the Supersonic Stratospheric Skydive

Austrian Felix Baumgartner took free-fall physics to new heights in October 2012. He leaped from a platform 24 miles above Earth and fell faster than the speed of sound! More...

Video
PBS
Do It: Free Fall

Do It: Free Fall

Grab two rulers and a couple of quarters and see the concept of free fall in action with this quick experiment. More...

Activity
DragonflyTV/PBS
Elephant and Feather: Free Fall

Elephant and Feather: Free Fall

If an elephant and a feather experienced true free fall at the same time, they'd hit the ground at the same time. Think you know why? Check your knowledge More...

Interactive
The Physics Classroom
Falling Feather: Mechanics Science Project

Falling Feather: Mechanics Science Project

Galileo's famous experiment illustrating that objects fall at the same rate of acceleration is only true in a vacuum. Outdo Galileo by repeating his experiment in a vacuum with this activity! More...

Activity
Exploratorium
Free Falling

Free Falling

Are you looking for a cool project idea about free-falling bodies? Take a look at this demonstration and make it your own. More...

Activity
education.com
Hammer vs Feather: Physics on the Moon

Hammer vs Feather: Physics on the Moon

We know that all objects (regardless of their mass) free fall with the same acceleration. But it's rare to see this demonstrated so starkly. Watch the astronauts of Apollo 15 put Galileo to the test! More...

Video
NASA
Regents Physics Free Fall

Regents Physics Free Fall

Want a more detailed understanding of free-falling bodies? Here's a site that will help you do the math associated with acceleration and velocity. More...

Article
APlusPhysics.com

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