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
- A.
1 joule
- B.
1 pascal
- C.
1 watt
- D.
1 farad
Attempted by 11 students.
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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.
Identify the given values: force F = 1 N, area A = 1 m² (the force acts perpendicular to the area).
Apply the pressure formula: P = F / A = 1 N ÷ 1 m².
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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