Define:acceleration due to gravity weightlessnessfree fallnull point


  • acceleration due to gravity 

  • weightlessness

  • free fall

  • null point

  • acceleration due to gravity: When an object falls freely towards the surface of the earth from a certain height, then its velocity changes. This change in velocity produces acceleration in the object which is known as acceleration due to gravity denoted by the letter g. The value of acceleration due to gravity is g= 9.8 m/s2.
  • weightlessness: Weightlessness, a condition experienced while in free-fall, in which the effect of gravity is cancelled by the inertial (e.g., centrifugal) force resulting from the orbital flight. The term zero gravity is often used to describe such a condition
  • Freefall: Freefall is defined as the motion of an object where gravity is the only force acting upon it. 
  • null point: Null point means the point in a field where the field quantity is zero.

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