WBJEE · Physics · Mechanical Properties of Fluids
A wooden block is floating on water kept in a beaker. \(40 \%\) of the block is above the water surface. Now the beaker is kept inside a lift that starts going upward with acceleration equal to \(g / 2\). The block will then
- A \(\operatorname{sink}\)
- B float with \(10 \%\) above the water surface
- C fioat with \(40 \%\) above the water surface
- D float with \(70 \%\) above the water surface
Answer & Solution
Correct Answer
(C) fioat with \(40 \%\) above the water surface
Step-by-step Solution
Detailed explanation
The buoyant force acting on an immersed body is equal to the weight of the fluid displaced by it, if the fluid is in rest. In this case, the fluid is accelerating upwards so the buoyant force must also provide the displaced fluid force to accelerate. Therefore, buoyant force…
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