Two Dimensional Motion

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Chapter 26

• Two Dimensional Motion
• Vectors Projectiles

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• Vector quantity -
• a quantity that has both magnitude and direction

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• Vector -
• an arrow drawn to represent a vector quantity
• it must be drawn to scale

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These represent equivalent vectors
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• Scalar quantity ----
• a quantity that has magnitude but not direction

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Examples.Vectors

• Speed
• Velocity.
• Acceleration..
• Time.
• Distance..

scalar vector vector scalar scalar
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Examples.Vectors

• Mass...
• Force
• density.
• momentum.

scalar vector scalar vector
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Represent the magnitude of a vector by the length
of the arrow.
2A
-A
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Resultant

• When two vectors are added together, the result
  is called the resultant.
• It is the diagonal or hypotenuse of a triangle.

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Components

• The vertical (y) and horizontal (x) vectors that
  are at right angles to each other. They can
  replace a vector.

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Projectile

• An object that moves through air or space. A
  projectile moving near the earths surface will
  follow a curved path due to the pull of gravity.

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Upwardly launched Projectiles

• Without g a projectile would follow the path that
  it was shot in. However due to g, the
  projectile will fall the same distance...

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• below the actual launch path that it would have
  fallen if it were dropped vertically.
• To achieve max. horizontal distance, a projectile
  should be launched at 45