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A bottle has an opening of radius a and ...

A bottle has an opening of radius a and length b. A cork of length b and radius `(a+Delta A)` is compressed to fit into the opening completely (See figure). If the bulk modulus of cork is B and frictional coefficient between the bottle and cork is  then the force needed to push the cork into the bottle is :

A

`(pi mu Bb)` a

B

`(2pi muB b) Deltaa`

C

`(pi mu B b) Delta a`

D

`(4pi mu Bd) Deltaa`

Text Solution

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The correct Answer is:
D
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