╌>

Why a cat always lands on its feet

  

Category:  Health, Science & Technology

Via:  bob-nelson  •  5 years ago  •  6 comments

Why a cat always lands on its feet
In 1894, a French scientist used a camera to solve a physics problem.

S E E D E D   C O N T E N T



Scientists in the late 19th century wanted to settle a curious physics problem: Why does a cat always lands on its feet? It should be impossible to reorient your body midair without pushing off of something first, but cats seem able to do it.

Étienne-Jules Marey used a camera to settle the question in 1894 with his series Photographs of a Tumbling Cat.

original Photographs of a Tumbling Cat, 1894.      Étienne-Jules Marey

Marey was a French scientist and inventor who analyzed how things moved. He developed a way to photograph multiple stages of movement onto a single glass plate, a technique called chronophotography.

Later, when Kodak introduced celluloid film, Marey swapped the glass plate for a roll of film that moved between exposures. This technique formed the basis of cinematography, and it’s how he recorded the stages of a cat righting itself in midair. He published his findings in Nature and demonstrated how the cat splits its body in two and uses the inertia of its own body weight to spin around.


Tags

jrDiscussion - desc
[]
 
Bob Nelson
Professor Guide
1  seeder  Bob Nelson    5 years ago

Cats!

 
 
 
Kavika
Professor Principal
2  Kavika     5 years ago

Center of gravity...

 
 
 
TᵢG
Professor Principal
3  TᵢG    5 years ago

Cool cats

 
 
 
Buzz of the Orient
Professor Expert
4  Buzz of the Orient    5 years ago

Fascinating on two levels - photography and cat-ability.

 
 
 
Buzz of the Orient
Professor Expert
6  Buzz of the Orient    5 years ago

Was the catamaran named such because it has the ability to remain upright?

DSCF9289.JPG

 
 

Who is online







bugsy
JBB
Ed-NavDoc


434 visitors