Moments, stability and pendulums

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  • Created by: Jasmin
  • Created on: 23-04-13 17:37
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  • Moments, Stability and Pendulums
    • if moments acting on an object arent equal the object will turn
    • If total anticlockwise moments do not equal the total clockwise  moment, there will be a resultant moment so the object will turn
    • Most stable objects have a wide base and low CoM
    • If line of action of weight of object lies outside base of object
      • Cause a resultant moment
        • Tip object over
          • Clockwise moment does not equal anti clockwise moment
    • Pendulum
      • Oscillating motion
      • Simple pendulum made by suspending weight from string
      • Little air resistence/friction on it at point of suspension takes long time to stop swinging
      • amplitude of an oscillating object is distance it moves from equilibrium position to higher position on either side
      • Time period = time taken for one complete cycle of its motion
        • Time period = 1(s)/frequency (Hz)
        • Time period depends on length - longer the pendulum greater the time period
      • Frequency of the oscillations is the number of complete cycles of oscillation per second
        • 1 Hz = 1 cycle per second
        • Greater the frequency of the oscillations, shorter the time period is

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