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

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Solution

It moves in the upwards direction because according to Newton's third law of motion every action has it's opposite and equal reaction.
Therefore when the air starts coming out from the
mouth of the balloon(action) in the downward direction, as a reaction the balloon moves upward .

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

It moves in the upwards direction because according to Newton's third law of motion every action has it's opposite and equal reaction. Therefore when the air starts coming out from the mouth of the balloon(action) in the downward direction, as a reaction the balloon moves upward .

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

It moves in the upwards direction because according to Newton's third law of motion every action has it's opposite and equal reaction.
Therefore when the air starts coming out from the
mouth of the balloon(action) in the downward direction, as a reaction the balloon moves upward .