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# If a Balloon Filled with Air and Its Mouth Untied/ is Released with Its Mouth in the Downward Direction, It Moves Upwards. Why ? - CBSE Class 9 - Science

ConceptSecond Law of Motion

#### Question

If a balloon filled with air and its mouth untied, is released with its mouth in the downward direction, it
moves upwards. Why ?

#### Solution

If the inflated balloon is released with its mouth untied in the downward direction, then it will move upwards because the air rushes out of balloon in the downward direction. The equal and opposite reaction of downward thrust of air pushes the balloon upwards.

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#### APPEARS IN

Lakhmir Singh Solution for Science for Class 9 Part 1 Physics (2016 to Current)
Chapter 2: Force and Laws of Motion
Long Answers | Q: 40.1 | Page no. 76

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Solution If a Balloon Filled with Air and Its Mouth Untied/ is Released with Its Mouth in the Downward Direction, It Moves Upwards. Why ? Concept: Second Law of Motion.
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