Pressure (Edexcel GCSE Physics): Flashcards
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13 cards from this deck
Definition of pressure
Definition of pressure
Force per unit area applied on a surface
Formula for pressure
Formula for pressure
Unit of pressure
Unit of pressure
Pascals (Pa)
1 Pa equals
1 Pa equals
1 N/m²
Why gases and liquids are fluids
Why gases and liquids are fluids
Particles can move freely
Cause of fluid pressure
Cause of fluid pressure
Collisions between particles and surface
Effect of increasing surface area on pressure
Effect of increasing surface area on pressure
Decreases pressure
Why denser fluids exert more pressure
Why denser fluids exert more pressure
More particles, more collisions
Effect of higher temp on fluid pressure
Effect of higher temp on fluid pressure
Increases pressure (faster particles)
Formula for pressure at depth
Formula for pressure at depth
Value of (gravitational field strength)
Value of (gravitational field strength)
m/s²
Atmospheric pressure at sea level
Atmospheric pressure at sea level
101,325 Pa (or 101.3 kPa)
Pressure in liquid with depth
Pressure in liquid with depth
Increases steadily with depth