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Physics
Physics
Problem
Which of the following expressions gives the magnitude of the force exerted by a uniform pressure
P
P
P
on a flat surface of area
A
A
A
? a)
F
=
1
2
P
A
F = \dfrac{1}{2}PA
F
=
2
1
P
A
b)
F
=
P
A
cos
θ
F = PA\cos\theta
F
=
P
A
cos
θ
c)
F
=
P
A
F = PA
F
=
P
A
d)
F
=
2
P
A
F = 2PA
F
=
2
P
A
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