In a free fall velocity of a stone is increasing equally in equal intervals of time under the effect of gravitational force of earth. The what can we say about the stones motion:
a) Uniform acceleration
b) Non Uniform acceleration
c) Retardation
d) Constant speed
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Dear student 
During free fall stone falls with acceleration equals to acceleration due to gravity (g) so acceleration is constant so velocity of speed is uniform. 
​​​​​So option a is correct. 
Regards 

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