Parachute

1485

Parachute

The book of science

Tom Sharp

Leonardo da Vinci aerodynamics

Parachute

Parachutes for war

Free fall

Precaution

Skydivers put themselves in a life-or-death situation and only by careful preparation do they avoid killing themselves. They do it not only because diving is exhilarating, but also because it is the closest humans get to a feeling of human-powered flight.

Thinking about free fall led Einstein to his general theory of relativity. A man in free fall would feel no force of gravity, and, given no force, would fall at a constant speed; however, on the contrary gravity causes him to accelerate.

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