Form 3 Physics - Boys'' Secondary Mosta Half-Yearly Examinations - Kullegg Maria Regina, 2016 Page 7

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S
B
ECTION
This section carries 45 marks.
6. This question is about pressure in liquids.
a) Name three factors that affect the pressure in a liquid.
[3]
______________________________________________________________________________
b) Holes are punched in a plastic bag filled with water as shown in the diagram below.
plastic bag filled
with water
What does this show about pressure in liquids?
[1]
______________________________________________________________________________
c) A large water tank is placed on top of a building as shown below.
water tank
1 m
4 m
building
A
B
3
(i) Calculate the water pressure at the bottom of the tank . The density of water is 1000 kg/m
.
[2]
______________________________________________________________________________
(ii) If a wider tank is used, would the pressure at the bottom of the tank be different? Explain.
______________________________________________________________________________
[2]
______________________________________________________________________________
(iii) Calculate the water pressure at A.
[2]
______________________________________________________________________________
(iv) What is the value of the water pressure at B? Explain.
______________________________________________________________________________
[2]
(v) An object becomes stuck in the pipe section between A and B and a result the water is
unable to flow. Calculate the force exerted by the water on the object given that it has
2
an area of 0.0002 m
.
______________________________________________________________________________
[3]
______________________________________________________________________________
Page 7 of 10
Physics Half yearly exam 2016– Track 3 - Form 3

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