Newton's laws of motion
Isaac Newton
[1] Born
- 4 January 1643 [O.S. 25 December 1642]
Woolsthorpe-by-Colsterworth, Lincolnshire, England
[2]
Died - 31 March 1727 (aged 84) [O.S. 20 March 1726]
Kensington, Middlesex, Great Britain
[3] Work
Fields - Physics
- natural philosophy
- alchemy
- theology
- mathematics
- astronomy
- economics
[4] discover
- the theory of universal gravitation
- the nature of white light
- calculus
Newton's laws of motion
[1] Newton’s First Law: Inertia
- An object at rest remains at rest, and an object in motion remains in motion at
constant speed and in a straight line unless acted on by an unbalanced force.
Examples of inertia involving aerodynamics :
- The motion of an airplane when a pilot changes the throttle setting of an engine.
- The motion of a ball falling down through the atmosphere.
- A model rocket being launched up into the atmosphere.
- The motion of a kite when the wind changes
[2] Newton’s Second Law: Force
- The acceleration of an object depends on the mass of the object and the
amount of force applied.
Example of force involving aerodynamics:
- An aircraft’s motion resulting from aerodynamic forces, aircraft weight, and thrust
[3] Newton’s Third Law: Action & Reaction
- Whenever one object exerts a force on a second object, the second object
exerts an equal and opposite force on the first.
Examples of action and reaction involving aerodynamics:
- The motion of lift from an airfoil, the air is deflected downward by the airfoil’s action
and in reaction, the wing is pushed upward.
- The motion of a spinning ball, the air is deflected to one side, and the ball
reacts by moving in the opposite
- The motion of a jet engine produces thrust and hot exhaust gases flow out the back of
the engine and a thrusting force is produced in the opposite direction.
