Acceleration due to gravity , Acceleration of free fall & Acceleration ,Instantaneous

Acceleration due to gravity:
         It is the acceleration of a freely falling body because of the attraction of the earth.It is denoted by 'g' which is 32.2 ft/sec²  in F.P.S system and 980.665 cm/sec² in C.G.S system.

 Acceleration of free fall :

      It refer to the acceleration due to gravity.

  Acceleration ,Instantaneous:

       If 'V' is the velocity of a body at a time 't' and v+δv is the acceleration of the body  at time  v+tv, then the instantaneous acceleration of the body at the limiting value of δv/δt as δt  → 0 and it is denoted by dv/dt   or  d²s/dt². where s is the distance travelled by  the body in the time 't'.