AIPMT | 2014Hard
Question
A balloon with mass m is descending down with an acceleration a (where a < g). How much mass should be removed from it so that it starts moving up with an acceleration a?
Options
A.
B.
C.
D.
Solution
a↓ mg - B = ma .......(i)
B - (m - m0)g = (m - m )a .......(ii)
Equation (i) + equation (ii)
⇒ mg - mg + m0g = ma + ma - m0a
⇒ m0 =
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