f4t - assessment 33 - 04.06.15
TRANSCRIPT
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7/25/2019 F4T - Assessment 33 - 04.06.15
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Date: .....................................................................
Assessment 31
Assume that i. g = 10 N/kg
ii. Forces are acting perpendicular
No. 1
Three concrete blocks can be stacked in to di!erent
a"s as shon:
#tack A #tack $
a.
less than the same
as
more
than
%omplete the paragraph belo using the phrases &rom
the bo'es abo(e. )ach phrase ma" be used once* more
than once or not at all.
The &orce o& stack A on the ground is
+++++++++++++++++++++++++++ the &orce o& stack $. The
pressure on the ground &rom stack $ is
+++++++++++++++++++++ the pressure &rom stack A*
because the area in contact ith the ground &or $ is+++++++++++++++++++++++++ &or A.
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b. rite don* in ords* the euation connecting
pressure* &orce and area.
c. & the eight o& stack A is 00 N and the area in
contact ith the ground is 200 cm2* calculate the
pressure on the ground in N/cm2.
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d. hat ould be the pressure i& the same &orce ould
act on hal& the area
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)'plain "our reasoning. ,1-
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No. 2
4n a particular da"* atmospheric pressure is 530 mm
o& mercur".
%on(ert this pressure in:
a. pascals ,2-
b. in atmospheres
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No. 3
Materia
l
Density(kg/m3)
mercur" 13*60ater 1*0007se the abo(e data to 8nd:
a. the pressure in pascals at the bottom o& a column o&ater one metre long.
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b. & a barometer is made using ater instead o&
mercur"* and a (er" long tube* ho high ill be the
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7/25/2019 F4T - Assessment 33 - 04.06.15
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ater column hen atmospheric pressure is 590 mm o&
mercur" one atmosphere;
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