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# Basic laws

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• Introduction Title Page
• ### Basic laws

1. 1. Basic Laws OfAerodynamics Or Aerodynamics for Dummies
2. 2. Newton’s Laws of Motion•Law of Inertia•Law of Acceleration•Law of Action and Reaction
3. 3. Law of InertiaNewton’s First Law:This law states that a body at rest willremain at rest, and a body in motionwill remain in motion until acted uponby an outside force.
4. 4. Practical example of the Law of Inertia•Rotor system prior to start (remains at rest)•Engine overcomes resistance tomovement (outside force)•Rotor continues to spin after shutdown(remains in motion)•Rotor slows due to air resistance(Drag or outside force)
5. 5. Law of AccelerationNewton’s Second Law:The force required to produce achange in the motion of a body isdirectly proportional to its mass andthe rate of change in its velocity.Acceleration is a change in velocitywith respect to time. It can be eitheran increase or decrease in velocity
6. 6. Acceleration = Force over MassThe force required to move an A-Staracross the ramp to some speed isgreater than the force required tomove an R-22 ORIf we applied the same force used tomove the A-Star on the R-22, the R-22would move faster, or accelerate.
7. 7. Law of Action and ReactionNewton’s Third Law:For every action, there is an equal andopposite reactionIf an interaction occurs between twobodies, equal forces in oppositedirections will be imparted to each body
8. 8. Torque Effect is an example of “Action - Reaction” or Another example is The Recoil from a Gun…
9. 9. QuestionWhy does the projectile move andthe barrel remain in place?
10. 10. Answer:Because the barrel has more mass
11. 11. Questions? Go home ball!