PHYSICS(MOTION/UNIT-2)

• The change in the position of an object with respect to a reference point is called motion.
• Motion is relative!
• A point whose position is assumed to be fixed is called a reference point.
• Position: The distance between reference point and object with its direction.
• Types of motion:

  1. Vibrational motion
  2. Rotational motion
  3. Translational motion
• Position(x):

  • Vector
  • Unit is "m"
  • Shown by "x"
• Distance(d): Scalar measure between two positions.
• Distance:

  • Unit is "m"
  • Shown by "d"
  • Scalar
• Displacement (delta x): Displacement is how far the object is from its starting point.
• Displacement:

  • Unit is "m"
  • Shown by"delta x"
  • Vector
• Displacement(delta x)=Xfinal-Xinitial
• Distance: How much ground an object has covered

  Displacement: How far out of place an object is
• Distance travelled per unit time is called speed
• Speed:

  • Scalar
  • Shown by"s"
  • Unit is "m/s"(SI) or "km/h"
• Velocity:

  • Vector
  • Shown by "v"
  • Unit is "m/s"(SI) or "km/h"
• Displacement per unit of time is called velocity
• 10m/s = 36km/h