A red cube with sides of 3 metres and blue cube with sides of 2 metres are on a table. They both weigh the same. Which cube exerts more pressure on the table? Give reason for your answer.
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Answer:2nd block
Explanation:
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Answer: The blue cube.
Explanation:
In case of the red cube,
Area in contact with the tabletop(a1) =3x3=9m²
In case of the blue cube,
Area in contact with the tabletop(a2)=2x2=4m²
Weight of both the cubes are same, i.e., F1=F2=F
Now,
Pressure exerted by red cube(P1) = F/a1 = F/9 ____(i)
Pressure exerted by blue cube(P2) = F/a2 = F/4 _____(ii)
eq. (i)/(ii),
P1/P2=4/9
=> P2= 9/4. P1 = 2.25.P1
Hence, P2>P1
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