question_answer

\[P,\,Q\] and \[R\] are three balloons ascending with velocities \[U,\,4U\] and \[8U\] respectively. If stones of the same mass be dropped from each, when they are at the same height, then                             [ISM Dhanbad 1994]

A)             They reach the ground at the same time

B)             Stone from \[P\] reaches the ground first

C)             Stone from \[R\] reaches the ground first

D)             Stone from \[Q\] reaches the ground first