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GCSE Questions on pressure, buoyancy, upthrust and fluids

Q14. A student made a hydraulic system using two syringes filled with water. The syringes were joined with a tube, as shown below.

(a) What property of water makes it suitable to use in a hydraulic system? Tick the correct answer.

It is almost incompressible.  
It is a poor electrical conductor.  
It is transparent.  

 

[1 mark]

(b) The student investigated how changing the cross-sectional area of piston B affected the force needed to keep piston B moving at a constant rate.

The results are shown in the graph below:

(i) Describe the relationship between the cross-sectional area of piston B and the force applied to piston B.

[2 marks]

(ii) The student used a newton-meter to measure the force applied to piston B.

The newton-meter is shown below.

What is the smallest change in force that can be measured with this newton-meter?

[1 mark]

[4 Marks TOTAL]