JEE PHYSICS MCQ: MECHANICAL PROPERTIES OF FLUIDS

1 Hard

1 of 1

Application +4 | -1

A stone of mass

10 \mathrm{~kg}

is lying at the bed of a large lake

10 \mathrm{~m}

deep. If the relative density of the stone is 2, the amount of work done by external force to bring slowly it at the surface of the lake will be (neglect all resistive forces)

View answer and explanation

Correct option: A

490 \mathrm{~J}

Option A (

490 \mathrm{~J}

) is correct because it is the work done against the net weight (weight - buoyant force) to lift the stone to the surface.

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