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A balloon os mass 2 KG is rising up with...

A balloon os mass 2 KG is rising up with an acceleration of `4m/s^2` . The upward force acting on the balloon is `(g = 10 ms^-2)

A

0.8kgf

B

2.8kgf

C

2.4kgf

D

2.0kgf

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