Photo AI

A solid block in the shape of a cube of length 120 cm rests on a table - Leaving Cert Physics - Question b - 2008

Question b

A solid block in the shape of a cube of length 120 cm rests on a table. The weight of the block is 25 N. Calculate the pressure it exerts on the table. $$ P = \frac{... show full transcript

Worked Solution & Example Answer:A solid block in the shape of a cube of length 120 cm rests on a table - Leaving Cert Physics - Question b - 2008

Step 1

Calculate the area of the cube's face

96%

114 rated

Answer

To find the area of one face of the cube, we use the formula for the area of a square:

$A = \text{length}^2$

Given the length of the cube is 120 cm, we convert this to meters:

$120 \text{ cm} = 1.2 \text{ m}$

Now we can calculate the area:

$A = (1.2 \, \text{m})^2 = 1.44 \, \text{m}^2$

Step 2

Calculate the pressure exerted by the block

99%

104 rated

Answer

Using the formula for pressure, we substitute the known values:

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

Where:

$F = 25 \, \text{N}$ (the weight of the block)
$A = 1.44 \, \text{m}^2$ (the area calculated previously)

Now we can find the pressure:

$P = \frac{25 \, \text{N}}{1.44 \, \text{m}^2} \approx 17.36 \, \text{N/m}^2$ .

Thus, the pressure exerted by the block on the table is approximately 17.36 N/m².

Join the Leaving Cert students using SimpleStudy...

97% of Students

Report Improved Results

98% of Students

Recommend to friends

100,000+

Students Supported

1 Million+

Questions answered

;