When a force of 1 N acts perpendicularly on an area of 1 m², the pressure is

2011

When a force of 1 N acts perpendicularly on an area of 1 m², the pressure is

  1. A.

    1 joule

  2. B.

    1 pascal

  3. C.

    1 watt

  4. D.

    1 farad

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Correct answer: B

Pressure is defined as the force acting perpendicular to a surface divided by the area over which it acts: P = F / A. Its SI unit is the pascal (Pa), where 1 Pa = 1 N/m².

  1. Identify the given values: force F = 1 N, area A = 1 m² (the force acts perpendicular to the area).

  2. Apply the pressure formula: P = F / A = 1 N ÷ 1 m².

  3. Compute the result: P = 1 N/m² = 1 Pa.

Checking the unit: by definition 1 pascal is exactly 1 newton per square metre, so the computed value 1 N/m² correctly reduces to 1 Pa, confirming the result independently of the arithmetic.

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