A balloon with mass ' \( m \) ' is descending down with an accelera...

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A balloon with mass ' \( m \) ' is descending down with an acceleration ' \( a \) ' (where \( ag \) ). How much mass should
P be removed from it so that it starts moving up with an

W acceleration ' \( a \) '? (Assume that it's volume does not change)
(1) \( \frac{2 m a}{g+a} \)
(2) \( \frac{2 m a}{g-a} \)
(3) \( \frac{m a}{g+a} \)
(4) \( \frac{m a}{g-a} \)
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