Physics Worksheet - Maria Regina Boy'S Secondary College Page 7
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97. This question is about hydraulic machines.
Figure 2 shows a hydraulic jack. When Piston A is pushed down Piston B is pushed up
and the car rises upwards
a) Calculate the pressure exerted by the piston when a force of 50 N is applied to it.
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b) Tick ( ) the right answer:
Pressure in the liquid is the largest at piston A
Pressure in the liquid is the largest at piston B
Pressure at piston A and piston B are equal
[1]
c) How much is the pressure at Piston B?
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[1]
d) Using the formula, Force = Pressure x Area, calculate the force at Piston B.
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[2]
e) Calculate the car’s mass in kilograms.
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f) If the car is replaced by a truck that weighs 40,000N, calculate the pressure
that would be needed to raise this truck?
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Page 7 of 9
Physics Half yearly exam 2014 – Track 2 - Form 3
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