A balloon of mass $M$ is descending at a constant acceleration $\alpha $. When a mass $m$ is released from the balloon it starts rising with the same acceleration $\alpha $. Assuming that its volume does not change, what is the value of $m$ ?
A balloon of mass $M$ is descending at a constant acceleration $\alpha $. When a mass $m$ is released from the balloon it starts rising with the same acceleration $\alpha $. Assuming that its volume does not change, what is the value of $m$ ?
- A
$\left[ {\frac{\alpha }{{\alpha + g}}} \right]M$
- B
$\left[ {\frac{2\alpha }{{\alpha + g}}} \right]M$
- C
$\left[ {\frac{{\alpha + g}}{\alpha }} \right]M$
- D
$\left[ {\frac{{\alpha + g}}{2\alpha }} \right]M$
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