Principle and Working:
Free fall instrument is the necessary instrument for the quantitative analysis of free falling objects. In the present set up, the value of g may be obtained with the help of photo gate, ball, picket fence with ten slit and a digital timer by using the equation,
g= (vf2- vi2 )/2s,
Where vf final velocity, vi initial velocity and s distance between leading edge of first black strip & leading edge of last black strip.