Physics · Oct / Nov 2021 · Paper 12 · Question 10
5054Pressure
Piston X is pushed into a hydraulic cylinder. Piston X produces a pressure P_X in the liquid in the cylinder. The diagram shows the cylinder viewed from above. [diagram] There are two other pistons, Y and Z, in the cylinder. The pressures on piston Y and Z are P_Y and P_Z. What is the relationship between P_X, P_Y and P_Z?
- AP_X = P_Y + P_Z
- BP_X > P_Z > P_Y
- CP_X < P_Z < P_Y
- DP_X = P_Y = P_Z
As printed in the paper
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Correct answer: D. P_X = P_Y = P_Z
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