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Chapter 13 Motion and Time

  • When object is moving, then we say that it is in motion.
  • Motion is of different types- Rectilinear motion, oscillatory motion, circulatory motion and vibratory motion etc.
  • Speed is the distance covered by the object in a unit time.
  • When an object is moving along a straight line with constant speed is known as uniform motion.
  • When an object is moving along a straight line with change in speed is known as non- uniform motion.
  • A motion which occur in the same internal of time is called periodic motion. Example- pendulum.
  • A metallic round shaped of the pendulum is called as bob.
  • Unit of time is second.
  • Unit of speed is ms-1 or m/s.
  • Measurement of speed is record on speedometer.
  • Odometer is a device which measure the distance covered by the vehicle.
  • A graphical display of data using bars of different heights is called as graph.
  • Visual representation of the given data called as graph.
  • Time taken by the pendulum to complete one oscillation is called its time period.
  • Graph shows a straight line, which it make between distance and time.
  • Shortest distance covered by the body or object is known as displacement.

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Exercise 1 ( Page No. : 157 )

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