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A5.1 - A5.2 Force and Pressure, Pressure in Liquids and Gases

⭐ +330 XP
  • ✓use the terms pressure and force correctly
  • ✓use the pressure formula P = F/A
  • ✓recall the units of pressure (Pa = N m⁻²)
  • ✓recall key facts about pressure in a liquid
  • ✓calculate the pressure at a depth in a liquid using P = ρgh
  • ✓measure gas or air pressure using suitable instruments
⏱ 0 mins🎯 66 marks
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Picture this: a vendor in St George’s (Grenada) stacks crates of bottled water. One crate presses down on the wooden stall. If the crate sits on a wide base, the stall is fine. If it sits on a narrow edge, the wood may dent. Same force… different pressure! Memory hook: PFA → Pressure = Force / Area.
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💡EngageQuestion 8 of 41

Which statement do you think best describes force (f)?

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💡Engage
Picture this: a vendor in St George’s (Grenada) stacks crates of bottled water. One crate presses down on the wooden stall. If the crate sits on a wide base, the stall is fine. If it sits on a narrow edge, the wood may dent. Same force… different pressure! Memory hook: PFA → Pressure = Force / Area.
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