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Physics · Grades 7–10

Pressure on a surface

Use the normal force and contact area in square metres.

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Rule and assumptions

Use the normal force and contact area in square metres.

p = F/A

Worked examples

A normal force of 702 N acts uniformly over 0.45 m². Find the pressure. Round to 3 decimal places if needed. Answer in Pa.

p = F/A 702 / 0.45 = 1560

1560 Pa

A normal force of 181 N acts uniformly over 0.32 m². Find the pressure. Round to 3 decimal places if needed. Answer in Pa.

p = F/A 181 / 0.32 = 565.625

565.625 Pa

Try two questions

  1. A normal force of 404 N acts uniformly over 0.31 m². Find the pressure. Round to 3 decimal places if needed. Answer in Pa.

  2. A normal force of 337 N acts uniformly over 0.43 m². Find the pressure. Round to 3 decimal places if needed. Answer in Pa.

Answers and reasoning

Answers and marking notes
  1. 1303.226 Pa

    p = F/A 404 / 0.31 = 1303.226

  2. 783.721 Pa

    p = F/A 337 / 0.43 = 783.721

Further reading and review references

These are reference links, not copied exercises, institutional endorsement or proof of independent review.

Learning preview · independent educational and translation review required. Suggested grades are not official curriculum alignment.