A hot- air balloon consists of a basket, one passenger, and some carge. Let the total mass be M.
Channel: Doubtnut
Date: 26/07/2020

A hot- air balloon consists of a basket, one passenger, and some carge. Let the total mass be M. Even though there is an upward lift force on the balloon, the balloon is initially acceleration downwards at a rate of `g//3`.  (a) Draw a free-body diagram  for the descending balloon.  (b) Find the upward lift force in terms of the initial total weight Mg.  (c ) The passenger notices that he is heading straight for a waterfall and decides he needs to go up. What fraction of the total weight must he drop overboard so that the balloon accelerates upward at a rate of `g//2`? Assume that the upward lift force remains the same.