Air Resistance

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Air Resistance
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Air Resistance is caused by friction. The
greater the surface area of the object the more
friction created and it will fall slower.
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But in a Vacuum they will both fall at the exact
same speed
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World With Out Air Resistance

• With out air resistance many things would be
  different. As seen on the previous slide things
  would all fall at the same rate. A pendulum
  would go on forever. Not only could you not
  paradrop out of a plane, but you couldnt get a
  plane to fly any way.

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Bernoulis principle
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You can see that the higher pressure pushes the
plane up while the lower one push down on it
creating lift
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How a glider works

• Gliders are like airplanes but with no
  engines. Bernoulli Principle of air resistance
  allowing them to hang in the air.

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Terminal Velocity

• Terminal Velocity is the highest speed a
  falling object reaches. As it falls down it
  accelerates until the acceleration balances out
  with air resistance, making the acceleration 0.

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See what I mean?
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So the parachuter cannot reach any more speed
because there is a balanced force.
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• So that is air resistance.
• Wow!

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Bibliography

• Leonard Bernstein Martin Schachter Alna Winkler
  Stanley Wolfe
• Physical Science
• (Upper saddle river Globe Fearon inc. 1998
• www.glenbrook.k12.il.us
• www.pnn.com
• www.1.slb.com