phy

• Free Fall Motion


  • Affected by only one force – gravitational force//weight
  • No air resistance (Vacuum//Shape)
• Free Fall Motion


  • Causes the falling objects (same mass or different mass)
  • Falling with constant acceleration (gravitational acceleration, g)
  • Same time taken to reach the ground.(Same height)
  • Velocity increases uniformly
• Heavy object falls faster//shorter time taken
• Lighter object falls slower//longer time taken
• Downwards motion is affected by two forces: Gravitational force//Weight and Air resistance
• Gravitational acceleration, g


  9.81 m/s^2
• Free Fall Motion


  1. Affected by only one force – gravitational force//weight

  2. No air resistance (Vacuum//Shape)

  3. Causes the falling objects (same mass or different mass) to fall with constant acceleration (gravitational acceleration, g)

  4. Same time taken to reach the ground.(Same height)

  5. Velocity increases uniformly
• In a vacuum, objects of different masses fall at the same rate
• If the object is heavier


  It falls faster and takes less time to reach the ground
• If the object is lighter

  It falls slower and takes more time to reach the ground
• Air resistance affects the motion of falling objects
• In the absence of air resistance (vacuum), objects of different masses fall at the same rate
• The acceleration due to gravity, g, is 9.81 m/s^2 on Earth
• The acceleration due to gravity is constant for all objects near the Earth's surface
• The velocity of a falling object increases uniformly with time in free fall
• The time taken for an object to fall a given distance is the same for all objects, regardless of their mass, in the absence of air resistance
• The displacement of a falling object is proportional to the square of the time elapsed
• The final velocity of a falling object is proportional to the square root of the distance fallen