A balloon starts rising from rest from ground at upward acceleration of 2 m/s2. Just after one second a stone is dropped from it. The time taken by it to reach ground is nearly
Upward acceleration of a rocket is given by (where v = speed of gas relative to rocket, M = mass of rocket and m = mass of fuel)
Upward acceleration of a rocket is given by (where v = speed of gas relative to rocket, M = mass of rocket and m = mass of fuel) with respect to gravity, the acceleration of rocket is given by
