Assertion : A balloon filled with hydrogen wi | vedclass

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Question

(A) On Earth,a balloon filled with hydrogen rises because the buoyant force (upthrust) is greater than the weight of the balloon.On the moon,there is

Vedclass · Accepted Answer

If both $Assertion$ and $Reason$ are correct and the $Reason$ is a correct explanation of the $Assertion$.

Vedclass · Answer

(A) On Earth,a balloon filled with hydrogen rises because the buoyant force (upthrust) is greater than the weight of the balloon.On the moon,there is no atmosphere,which means there is no air to provide a buoyant force.Therefore,the balloon will undergo free fall under the influence of the moon's gravity alone.The acceleration due to gravity on the moon is $\frac{g}{6}$,where $g$ is the acceleration due to gravity on Earth.Since the balloon is in free fall,its acceleration will be equal to the acceleration due to gravity on the moon,which is $\frac{g}{6}$.Thus,both the $Assertion$ and $Reason$ are correct,and the $Reason$ correctly explains why the balloon falls with that specific acceleration.

$Assertion$ : $A$ balloon filled with hydrogen will fall with acceleration $\frac{g}{6}$ on the moon.
$Reason$ : Moon has no atmosphere.

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$Assertion$ : $A$ balloon filled with hydrogen will fall with acceleration $\frac{g}{6}$ on the moon.$Reason$ : Moon has no atmosphere.