Form 2 Track 2 Physics Worksheet - Annual Examinations For Secondary Schools, 2012 Page 4
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114.a.
A garden pot containing soil weighs 360 N. The pot rests on three small blocks, so that
unwanted water can drain out of the holes in the base of the pot. The soil is uniformly
distributed in the pot.
i.
Draw an arrow on the diagram to represent the
weight of the pot. Label it W.
(1)
ii.
The area of each block in contact with the base of
2
the pot is 0.0025 m
. Calculate the total pressure, in
pascals, exerted on the blocks.
______________________________________________________
______________________________________________________
(2)
iii.
The gardener finds that the blocks sink into the ground. The water in the pot cannot
drain easily out of the pot. Suggest one way of reducing the sinking of the pot.
________________________________________________________________________________
________________________________________________________________________________
(2)
b.
i.
A dam is used to collect water.
dam
Mark with an X the position
on the dam where the water
pressure is greatest.
water
(1)
ii.
The water is 5 m deep. Calculate the pressure exerted by the water at this depth if
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the density of the water is 1000 kg/m
.
________________________________________________________________________________
________________________________________________________________________________
(2)
Page 4 of 11
Physics – Form 3 Secondary – Track 2 – 2012
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