Page 17 - Spotlight A+ Physics Form 4.5

Form
5 Physics Chapter 2 Pressure

Paper 1

1. Figure 1 shows an excavator. 3. Figure 3 shows a flask connected to a mercury
manometer. The pressure of the gas in the flask
CHAP is 83 cm Hg.
2
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Flask Gas

20 cm
12 cm
Figure 1
What is the physics principle or law that is applied Figure 3
to move the arm of the excavator? C3 What is the value of the atmospheric pressure?
A Pascal’s principle C3
B Archimedes’ principle
C Bernoulli’s principle A 71 cm Hg
D Newton’s Third Law of Motion B 75 cm Hg
C 76 cm Hg
SPM Clone
2. Figure 2 shows the supply of water from a tank. D 91 cm Hg
The reading of a pressure meter at X is 2.8 × 10 5
Pa and the density of water is 1 000 kg m . 4. Figure 4 shows a hydraulic system to lift a car.
–3
–2
[g = 9.81 m s ]

Tank

Area, Pressure, P Area,
2
A Pressure, P A
1 1 2
h
Figure 4
The multiplying factor of the hydraulic system is
X
C3
A
A —––
1
Figure 2 A 2
A
What is the value of h in the situation above? B —––
2
C3 A 1
A 2.85 m P 1
B 28.0 m C —––
P
2
C 28.5 m P
2
D 285 m D —––
P
1

298