Givne data:
• The mass of beaker is ,m,=1.2 kg.
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• The mass of water is ,m,'=2.5 kg.
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• The mass of block is ,M,=3.8 kg.
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• The density of water is ρb=3300 kg/m³.
The buoyancy force experienced by the block is given by,
[tex]\begin{gathered} F_B=\rho_wV_bg \\ F_B=\rho_w\frac{M_{}}{\rho_b}g \\ F_B=(1000)(\frac{3.8_{}}{3300})(9.8) \\ F_B=11.28\text{ N} \end{gathered}[/tex]
Here, Vb is the volume of block, and ρw is the density of water.
The wieght of block will be,
[tex]\begin{gathered} W^{\prime}=Mg \\ W^{\prime}=(3.8)(9.8) \\ W^{\prime}=37.24\text{ N} \end{gathered}[/tex]
Since the buoyancy force acts in upward direction and wieght of block acts in downward direction, therefore the net force experienced by the upper scale will be,
[tex]\begin{gathered} W=W^{\prime}-F_B \\ W=37.24-11.28 \\ W=25.96\text{ N} \end{gathered}[/tex]
Thus, the upper scale will read 25.96 N of reading.
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