Question

A block weighing $1\text{kg}$ is in the shape of a cube of length $10\text{cm}$. It is kept on a horizontal table. Find the pressure on the portion of the table where the block is kept.

• A. $1100{\text{N/m}}^2$
• B. $1200{\text{N/m}}^2$
• C. $1000{\text{N/m}}^2$
• D. $1300{\text{N/m}}^2$

Answer 1

The correct option is C $1000{\text{N/m}}^2$

Force acting on the table due to the block is equal to the weight of the block.

$\therefore F=mg=1\times 10=10\text{N}$

Now, surface area of the block,

$A=10\times 10=100{\text{cm}}^2=0.01{\text{m}}^2$

Now, pressure,

$P=\frac{F}{A}$

$\Rightarrow P=\frac{10}{0.01}$

$\therefore P=1000{\text{N/m}}^2$