An object falling freely from rest reaches on ground in 3s (a = 10) the velocity of object on reaching the ground :
A 10m\s
B 20 m\s
C 30 m\s
D 0
12: A ball is released from a height and it reaches the ground 3 s. If a = 9.8. find distance
A 29.4 m
B 19.6 m
C 44.1
D m 27.4 m
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