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History
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The 1902 Wright Glider shows its lift by pulling up
The 1902 Wright Glider shows its lift by pulling up
A cross-section of a wing defines an airfoil shape.
A cross-section of a wing defines an airfoil shape.
Angle of attack of an airfoil
Angle of attack of an airfoil
An airfoil with camber compared to a symmetrical airfoil
An airfoil with camber compared to a symmetrical airfoil
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Aristotle famously described a force as anything that causes an object to undergo "unnatural motion"
Aristotle famously described a force as anything that causes an object to undergo "unnatural motion"
Sir Isaac Newton in 1689. His Principia presented his three laws of motion in geometrical language, whereas modern physics uses differential calculus
Sir Isaac Newton in 1689. His Principia presented his three laws of motion in geometrical language, whereas modern physics uses differential calculus and vectors.
Galileo Galilei was the first to point out the inherent contradictions contained in Aristotle's description of forces.
Galileo Galilei was the first to point out the inherent contradictions contained in Aristotle's description of forces.
Images of a freely falling basketball taken with a stroboscope at 20 flashes per second. The distance units on the right are multiples of about 12 mil
Images of a freely falling basketball taken with a stroboscope at 20 flashes per second. The distance units on the right are multiples of about 12 millimeters. The basketball starts at rest. At the time of the first flash (distance zero) it is released, after which the number of units fallen is equal to the square of the number of flashes.