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SS1: PHYSICS – 1ST TERM

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  1. Introduction to Physics | Week 1
    4 Topics
    |
    1 Quiz
  2. Measurement I | Week 2
    3 Topics
    |
    1 Quiz
  3. Measurement II | Week 3
    6 Topics
    |
    1 Quiz
  4. Motion | Week 4
    5 Topics
    |
    1 Quiz
  5. Velocity-Time Graph | Week 5
    4 Topics
    |
    1 Quiz
  6. Causes of Motion | Week 6
    5 Topics
    |
    1 Quiz
  7. Work, Energy & Power | Week 7
    3 Topics
  8. Energy Transformation / Power | Week 8
    3 Topics
    |
    1 Quiz
  9. Heat Energy | Week 9
    5 Topics
    |
    1 Quiz
  10. Linear Expansion | Week 10
    7 Topics
    |
    1 Quiz



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Topic Content:

  • Circular Motion

What is Circular Motion?

Circular motion is a movement of an object along the circumference of a circle or rotation along a circular path.

It can be uniform with a constant angular rate of rotation and constant speed or non-uniform with a changing rate of rotation.

For example, an artificial satellite orbiting the earth at a constant height, a ceiling fan’s blade rotating around a hub, a stone which is tied to a rope and whirled in circles, a car turning through a curve in a race track, planets moving around the sun.

centripetal acceleration

If acceleration is the time rate of change of velocity, a change in the direction of velocity also constitutes a change in magnitude of the acceleration.

The acceleration is always directed towards the centre of the circular path and this is called centripetal acceleration.

a =  \( \frac {v^2}{r}\)

v = velocity of the object, and it is always directed along the tangent to the circle at any point of the path.

 

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