Pressure = Force / ?

**The reasoning** Pressure measures how concentrated a force is over a surface. Think of it this way: if you press your palm against a wall versus pressing a needle with the same force — the needle creates way more pressure because that force is concentrated on a tiny area. The formula is: **Pressure = Force / Area** The unit confirms this: Pressure is measured in **Pascals (Pa)**, where 1 Pa = 1 Newton per square meter (N/m²). See? Force (Newtons) divided by Area (square meters). **Why the wrong options tempt you** - **Mass (A)**: Easy mix-up because Force = Mass × Acceleration. But pressure isn't about the object's mass — it's about how that force spreads. - **Volume (B)**: Volume matters in *density* (mass/volume), not pressure. Different formula entirely. - **Time (D)**: Time relates to concepts like impulse or power, but pressure is instantaneous — it doesn't care how long the force acts. **Quick takeaway** Remember: **Pressure is force per unit area** — the smaller the area, the greater the pressure, which is why a sharp knife cuts better than a blunt one!