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In the absence of other physical factors, there are only two physical changes that can increase the pressure exerted by a solid object on a horizontal surface. These changes are an increase in the contact force of the object and a decrease in the contact area of the object. If the object is at rest, its contact force is equal to the object’s weight.
Assuming the statements above are accurate, it is true that for a solid object at rest on a horizontal surface
A. any increase in the pressure exerted on the surface by the object is due to a decrease in its contact area
B. if changes in the solid object’s contact force occur, there will be compensating changes to the object’s contact area with the surface
C. if there is a decrease in the object’s weight, then, other factors being equal, the pressure exerted on the surface by the object must increase
D. a solid object with a constant contact area always exerts constant pressure on the horizontal surface
E. if other physical factors are unchanged, increasing the object’s weight will lead to an increase in the pressure exerted by the object on the horizontal surface
The OA will be automatically revealed on Monday 27th of April 2026 07:00:22 PM Pacific Time Zone
Assuming the statements above are accurate, it is true that for a solid object at rest on a horizontal surface
A. any increase in the pressure exerted on the surface by the object is due to a decrease in its contact area
B. if changes in the solid object’s contact force occur, there will be compensating changes to the object’s contact area with the surface
C. if there is a decrease in the object’s weight, then, other factors being equal, the pressure exerted on the surface by the object must increase
D. a solid object with a constant contact area always exerts constant pressure on the horizontal surface
E. if other physical factors are unchanged, increasing the object’s weight will lead to an increase in the pressure exerted by the object on the horizontal surface
The OA will be automatically revealed on Monday 27th of April 2026 07:00:22 PM Pacific Time Zone
26 Apr 2026, 20:11
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Type: Inference (must be true)
Given:
only two ways to increase pressure:
prethinking:
so for an object at rest, pressure increases if:
now check options:
A: says any increase in pressure is due to decrease in area
wrong, because it could also be due to increase in weight
eliminate
B: says if contact force changes, area will compensate
no such relationship given
eliminate
C: decrease in weight → pressure must increase
opposite of logic; lower weight would reduce pressure (if anything)
eliminate
D: constant area → constant pressure
wrong, because weight could change, affecting pressure
eliminate
E: increasing weight → increase in pressure (other factors same)
this directly follows from:
weight = contact force, and increasing contact force increases pressure
correct
final answer: E
Given:
only two ways to increase pressure:
- increase contact force
- decrease contact area
prethinking:
so for an object at rest, pressure increases if:
- weight increases, or
- contact area decreases
now check options:
A: says any increase in pressure is due to decrease in area
wrong, because it could also be due to increase in weight
eliminate
B: says if contact force changes, area will compensate
no such relationship given
eliminate
C: decrease in weight → pressure must increase
opposite of logic; lower weight would reduce pressure (if anything)
eliminate
D: constant area → constant pressure
wrong, because weight could change, affecting pressure
eliminate
E: increasing weight → increase in pressure (other factors same)
this directly follows from:
weight = contact force, and increasing contact force increases pressure
correct
final answer: E
26 Apr 2026, 22:41
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physical factors absence- only two physical changes can increase the pressure exerted by solid object on horizontal surface.
these changes- increase the contact force of object and decrease the contact area of object.
if at rest, force is equal to weight.
A. any increase in the pressure exerted on the surface by the object is due to a decrease in its contact area
increase in pressure happens because of two changes and not one. so out. this mention somewhat same thing as passage has mentioned. reject.
B. if changes in the solid object’s contact force occur, there will be compensating changes to the object’s contact area with the surface
not necessarily.
C. if there is a decrease in the object’s weight, then, other factors being equal, the pressure exerted on the surface by the object must increase
if weight goes down then force goes down and if that happens then pressure doesnt increase. as the passage says the only way to increase pressure is to increase force and decrease area. so reject.
D. a solid object with a constant contact area always exerts constant pressure on the horizontal surface
not concerned with how object put pressure on surface. reject.
E. if other physical factors are unchanged, increasing the object’s weight will lead to an increase in the pressure exerted by the object on the horizontal surface
if weight goes up- force goes up then pressure goes up. it clears the missing gap
these changes- increase the contact force of object and decrease the contact area of object.
if at rest, force is equal to weight.
A. any increase in the pressure exerted on the surface by the object is due to a decrease in its contact area
increase in pressure happens because of two changes and not one. so out. this mention somewhat same thing as passage has mentioned. reject.
B. if changes in the solid object’s contact force occur, there will be compensating changes to the object’s contact area with the surface
not necessarily.
C. if there is a decrease in the object’s weight, then, other factors being equal, the pressure exerted on the surface by the object must increase
if weight goes down then force goes down and if that happens then pressure doesnt increase. as the passage says the only way to increase pressure is to increase force and decrease area. so reject.
D. a solid object with a constant contact area always exerts constant pressure on the horizontal surface
not concerned with how object put pressure on surface. reject.
E. if other physical factors are unchanged, increasing the object’s weight will lead to an increase in the pressure exerted by the object on the horizontal surface
if weight goes up- force goes up then pressure goes up. it clears the missing gap
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