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Q.

When we release the neck of the inflated balloon to allow air to escape from the balloon, then

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a

there will be no force acting on the wall at neck

b

there is a force exerted by air inside balloon which is acting in a direction opposite to neck

c

the balloon will accelerates in the direction in which the force is acting

d

all the above

answer is D.

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Detailed Solution

There will be no force acting on the wall at neck.\ There is a force exerted by air inside balloon which is acting in a direction opposite to neck.
The balloon will accelerates in the direction in which the force is acting.
 

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