G7 SCIENCE

• Speed


  Change in distance that a body moves in a period of time
• Velocity


  Change in displacement in a period of time
• Velocity has direction in its unit
• Elements of Speed


  • Distance
  • Time
• Elements of Velocity


  • Displacement
  • Time
  • Direction
• Formula for Speed


  S=
• Formula for Velocity


  v=
• Units


  • Meter
  • per second
  • m/s
  • Meter per second, N
  • m/s, N
• Distance units


  • Meters = m
  • Miles = mi
  • Kilometers = km
  • Feet = ft
  • Yards= yd
  • Inches= in
• Time units


  • Hours = hr
  • Minutes= min
  • Seconds = s
• Direction units


  • North= N
  • South = S
  • East = E
  • West = W
• Speed


  Rate of change of distance with respect to time
• Unit of speed is distance (length) divided by time
• GRESA Method


  1. Given

  2. Required

  3. Equation

  4. Solution

  5. Answer
• Distance: d, Speed: S, Time: t, Equation: d=St