Three cuboids A, B and C of weights 100 N, 200 N and 1000 N, have surface areas 2m2
, 2m2
and 10m2
respectively. The cuboids which exert the same pressure are: [1]
(a) A and B (b) B and C (c) A and C (d) A, B and C
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Pressure = Force / Area
Pressure for cuboid A - 100N/2m²= 50 pa.
Pressure for cuboid B - 200N/2m²= 100 pa.
Pressure for cuboid C - 1000N/10m²= 100 pa.
Therefore, Cuboid B and C will exert same pressure.
So, correct option is (b) B and C
Pressure for cuboid A - 100N/2m²= 50 pa.
Pressure for cuboid B - 200N/2m²= 100 pa.
Pressure for cuboid C - 1000N/10m²= 100 pa.
Therefore, Cuboid B and C will exert same pressure.
So, correct option is (b) B and C
Answered by
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Hey there !
Cuboid A :-
Surface area = 2 m²
Force = 100 N
Cuboid B :-
Surface area = 2m²
Force = 200 N
Cuboid C :-
Surface area = 10 m²
Force = 1000 N
Pressure = Thrust / Area
Pressure is inversely proportional to area.
If area increases , pressure decreases and vice versa.
Pressure exerted by cuboid A = 100 / 2 = 50 Pa
Pressure exerted by cuboid B = 200 /2 = 100 Pa
Pressure exerted by cuboid C = 1000/10 = 100 Pa
The cuboids which exert same pressure :-
(b) B and C
Cuboid A :-
Surface area = 2 m²
Force = 100 N
Cuboid B :-
Surface area = 2m²
Force = 200 N
Cuboid C :-
Surface area = 10 m²
Force = 1000 N
Pressure = Thrust / Area
Pressure is inversely proportional to area.
If area increases , pressure decreases and vice versa.
Pressure exerted by cuboid A = 100 / 2 = 50 Pa
Pressure exerted by cuboid B = 200 /2 = 100 Pa
Pressure exerted by cuboid C = 1000/10 = 100 Pa
The cuboids which exert same pressure :-
(b) B and C
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