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Buoyant Force

A cork is sub...

Question

A cork is submerged in water by a spring attached to the bottom of a bowl. When the bowl is kept in an elevator moving with acceleration downwards, the length of spring

A

Increases

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B

Decreases

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C

Remains unchanged

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D

None of these

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Solution

The correct option is B
Decreases

Effective weight $W = m (g - a)$ which is less than actual weight mg, so the length of spring decreases.

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