Question

a body is dropped from a balloon moving up with it is at a height of 74.4 if it takes 6 seconds to reach the ground what is the velocity of the balloon​

Answer 1

we know s=ut+1/at^2

s=74.4

t=6sec

taking g= 10m/s

by solving the first equation we got u = -19.6m/s

here negetive sign show that the body will move upword when released due to law of inertia.

final velocity

v=u+at

=-19.6+(10×6)

=-19.6+60

=40.4m/s