Question

A stone is dropped from a balloon going up with
uniform velocity of 5 m/s. If the balloon was
50m high when the stone was dropped, find its
height when the stone hits the ground. Take
9 10 m/s2
(A) 68.5 m
(B) 67.5 m
(C) 65.5 m
(D) 66.5 m​

Answer 1

Hint: Here balloon is going up and at the same time stone is falling down from a certain height so velocity of balloon becomes equal to velocity of stone at the time of falling only direction is taken in the opposite order. So the velocity of the balloon is taken as positive and velocity of stone negative.

Answer D