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Answer:
We know that,
Pressure = Force ÷ Area
First let's find the force of the cube.
F = m × g
= 20 kg × 10 ms⁻²
= 200N
Now let us find the Area of the cube.
A = 6 a²
= 6 × [tex]\frac{50}{100}[/tex] × [tex]\frac{50}{100}[/tex]
= 1.5 m²
Now let us find the pressure.
Pressure = Force ÷ Area
= 200 N ÷ 1.5 m²
= 133 . 33 N m⁻² / 133 . 33 Pa
Hope this helps you :-)
Explanation:
We know that
F = ma
Here,
a = g = 10 m/s²
So,
F = mg
=> F = 20 × 10
=> F = 200 N
now,
As 1 m = 100 cm
50 cm = 50/100 = 0.5 m
=> SA of cube = 6a²
=> SA = 6(0.5)²
=> SA = 6 × 0.25
=> SA = 1.5 m²
Now,
P = F/A
=> P = 200/1.5
=> P = 2000/15
=> P = 400/3
=> P = 133.3 Pa