Question
Which one among the following statements is correct?
NDA
General Ability
General Science
2025
NDA 2025 (Phase 2)
NDA General Ability Question (2025) — Solution
Options
- A. Pressure has magnitude as well as direction
- B. As we go deeper in a liquid, the pressure decreases
- C. Action and reaction forces act on the same object
- D. Pascal and N/m^2 represent the same unit
Answer
D. Pascal and N/m^2 represent the same unit
Step-by-step solution
Pressure is a scalar quantity, meaning it has magnitude but no specific direction, as it acts equally in all directions at a point in a fluid. As depth in a liquid increases, the pressure increases according to the relation P = P_0 + g h. According to Newton's third law of motion, action and reaction forces always act on two different objects. The SI unit of pressure is defined as force per unit area, which is N/m ^2. This unit is also known as Pascal (Pa). Therefore, Pascal and N/m ^2 represent the same unit. Answer: Pascal and N/m^2 represent the same unit
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