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2D Motion as Two 1D Motions

A block of ma...

Question

A block of mass ‘m’ is attached by means of a spring to the bottom of a tank of water as shown in figure. At equilibrium, the spring is under compression. If the tank is now allowed to fall freely, then choose the correct alternative(s)

A

the spring comes to its relaxed position

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B

the spring compresses more than its equilibrium compression

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C

the boyant force becomes zero

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D

there will be some elongation is the spring

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Solution

The correct options are
B the spring compresses more than its equilibrium compression
C the boyant force becomes zero
As the tank is allowed to fall freely, so bouyant force becomes zero, hence the spring compresses more than its equilibrium compression.

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