Question

hot air ballon going downwards with an acceleration .For the hot air ballon to
go upward with same acceleration
How much mass should be
reduced from the balloon​

Answer 1

Answer:

Solution :

Let

F

be the upthrust of air in either case <br> In(i) case,

Mg-F=Ma

…(i) <br> In (ii) case

F-(M-m)g=(M-m)a

…(ii) <br> using (i)

(Mg-Mg)-Mg+Mg=Ma-ma

<br> or

M(g+a)=2Ma

<br>

m=2Ma/g+a

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