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The weight of an empty balloon on a spri...

The weight of an empty balloon on a spring balance is `W_(1)`. The weight becomes `W_2` when the balloon is filled with air. Let the weight of air itself be W. Neglect the thickness of balloon when it is filled with air. Also neglect the difference the density of air inside and outside the balloon.

A

`W_(2) lt W_(1) + W`

B

`W_(2) = W_(1) + W`

C

`W_(2) gt W_(1)+W`

D

`W_(2) lt W_(1)`

Text Solution

Verified by Experts

The correct Answer is:
A
Total weight of the balloon and air = `W_(1) + W_(2)`.
If FB is the buoyant force, then
`W_(2)= W_(1) + W -F_(B)` or `W_(2) lt W_(1) + W`
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