Physics I Class 12

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Physics IClass 12
Uniform Circular Motion
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Newtons Second Law -Yet Another Review!
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Uniform Circular Motion
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Acceleration in Circular Motion

• When an object travels in a circle, its velocity
  is constantly changing (in direction at least).
• That means the object has a non-zero acceleration
  even if it moves at constant speed.

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Important Facts AboutVelocity and Acceleration
Vectors
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What is the Direction of Acceleration?
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Centripetal ForceCentrifugal Force
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ExampleA Rock on a String
Twirl a 1 kg rock attached to a string in a 1 m
radius vertical circle. The speed is 4 m/sec.
What forces act on the rock and what are the
directions of those forces?
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Using Newtons Second Law to Solve Problems -
Review
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Case ARock at the Top of the Circle
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Case BRock at the Bottom of the Circle
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Normal Force - A ConceptWe Will Use in Todays
Activity
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Class 12Take-Away Concepts
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Class 12Problems of the Day
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Class 12Problems of the Day
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Activity 12Ferris Wheel Thrill Ride
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Class 12 Optional MaterialCentrifugal Force?
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Accelerated Frames of Reference
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The Inertial Forces
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DiscussionSwinging a Water Bucket Overhead