A ballon moves up with a velocity `5 m//s`. A stone is thrown from it with a horizontal velocity `2 m//s` relative to it. The stone hits the ground at a point `10 m` horizontally away from it. (Take `g = 10 m//s^(2)`)
A. the time of flight of the stone is `5` seconds
B. height of the ballon at the time of throwing the stone is `100 m`.
C. the speed with it will hit the ground is `40 m//s`
D. the time of flight of the stone will increase if the horizontal velocity of the stone is incresed.
