Question

Will the block float or sink in water when released?

• A. The block will float since upthrust on it is less than its weight when fully immersed in water.
• B. The block will float since upthrust on it is equal to its weight when fully immersed in water.
• C. The block will float since upthrust on it is more than its weight when fully immersed in water.
• D. None of the above

Answer 1

The correct option is C The block will float since upthrust on it is more than its weight when fully immersed in water.

Upthrust when fully immerge = $Vdg$
$15\times {10}^{-3}\times 1000\times 10=150kg$
$\Rightarrow =15kgf$
The block will float since upthrust on it is more than its weight when fully immersed in water.