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15.2 Pressure in fluids

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Question 3

Two vertical, cylindrical fuel storage tanks, Tank P and Tank Q, are filled with diesel fuel of density 830 kg m-3 to the same depth of 15 m. Tank Q has a diameter that is exactly 3.0 times larger than the diameter of Tank P.

What is the ratio of the hydrostatic pressure at the bottom of Tank Q to that of Tank P, pQpP\displaystyle \frac{p_{\text{Q}}}{p_{\text{P}}}pP​pQ​​, and the ratio of the total force exerted by the fuel on the bottom of Tank Q to that of Tank P, FQFP\displaystyle \frac{F_{\text{Q}}}{F_{\text{P}}}FP​FQ​​?

A

pQpP=1\frac{p_{\text{Q}}}{p_{\text{P}}} = 1pP​pQ​​=1 and FQFP=3\frac{F_{\text{Q}}}{F_{\text{P}}} = 3FP​FQ​​=3

B

pQpP=3\frac{p_{\text{Q}}}{p_{\text{P}}} = 3pP​pQ​​=3 and FQFP=9\frac{F_{\text{Q}}}{F_{\text{P}}} = 9FP​FQ​​=9

C

pQpP=1\frac{p_{\text{Q}}}{p_{\text{P}}} = 1pP​pQ​​=1 and FQFP=9\frac{F_{\text{Q}}}{F_{\text{P}}} = 9FP​FQ​​=9

D

pQpP=9\frac{p_{\text{Q}}}{p_{\text{P}}} = 9pP​pQ​​=9 and FQFP=9\frac{F_{\text{Q}}}{F_{\text{P}}} = 9FP​FQ​​=9

Markscheme

15.2 Pressure in fluids Questions

  1. GCSE
  2. /Physics
  3. /15.2 Pressure in fluids

54 exam-style questions on Edexcel GCSE Physics 15.2 Pressure in fluids, covering 15.2.1 Atmospheric pressure and height, 15.2.2 Pressure in fluids, 15.2.3 Pressure, force and area, 15.2.4 Pressure and depth, 15.2.5 Pressure in liquids: depth and density, 15.2.6 Upthrust, and 15.2.7 Floating and sinking. Each one has a worked solution and a mark scheme showing where the marks go.

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