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Sailing physics pow pt 2012 edited
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Sailing physics pow pt 2012 edited

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Newton's Second and Third Laws of Motion …

Newton's Second and Third Laws of Motion
Bernouli's Principle

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  • 1. SailingConceptual Physicsannie cloutier 2012 copyrightWind Power is the ForceNweton’s Second Law F = m aNewton’s Third LawAction ~ ReactionBernoulli’s Principle
  • 2. http://science.kqed.org/quest/video/the-physics-of-sailing/ Position  Is defined in relation to a reference point  Velocity is described by Velocity direction and speed of an object ∆ delta means change  Change in velocity is due to changes in speed, direction or both
  • 3. An original idea…
  • 4. Understanding Motion Speed  How fast an object is moving calculate by dividing the distance covered by time Instantaneous speed  The speed at any instant  Average speed is the total Average speed distance covered divided by the time Total distance  Is the average speed times the travel time
  • 5. NEWTON’S THIRD LAW Action - ReactionFor every action there is an equal and opposite reaction When an object is subjected to multiple forces at once, the result is the cumulative effect of all the forces When forces on an object are balanced, the object will change its velocity When forces are not balanced, no acceleration occurs When a body A exerts a force on a body B, B exerts an equal and opposite force on A
  • 6. Newton’s Third LawInversely proportional cannonball F/m =a Cannon F /m=a
  • 7. Velocity and Acceleration Velocity  Acceleration Is speed in a given  Is the rate at which the direction velocity is changing Speed is a description  Acceleration can apply of how fast an object is to decreases as well as moving increases in speed Velocity is how fast  Deceleration is the and in what direction it decreasing of speed moves (slam on your brakes)
  • 8. Conservation of Energy An unbalances force on an object produces a change in momentum States that the energy can not be created or destroyed Energy can be transferred from one form into another, but the total amount of energy never changes.
  • 9. Bernoulli’s Principle
  • 10. Pressure, push or pull is FORCE
  • 11. Henri Coanda Romanian Jet Design scientist 1886-1972 andSir Frank Whittle British scientisthttp://www.youtube.com/watch?v=EYuNKarb8oY
  • 12. http://web.mit.edu/2.972/www/reports/sail_boat/sail_boat.html  But you can never sail directly into the wind
  • 13. Activity :Bernoulli’s Principle  5 cm wide x 28 cm long strip of paper  Blow across the top of the paper strip  Notice the position of the end of the paper.
  • 14. The end