2.10 - Pressure Flashcards
What is pressure defined as?
the force applied over a certain area
Which formula is used to calculate pressure?
pressure = Force ÷ Area
If a force of 10 newtons is applied over an area of 5 square metres, what is the pressure?
2 N/m²
What is the unit of pressure?
pascal (Pa)
What creates atmospheric pressure?
the downward force of the atmosphere
How does atmospheric pressure change with elevation?
pressure decreases with elevation
In liquids like water, how does pressure change with depth?
pressure increases with depth
What is the upward force caused by pressure in liquids called?
upthrust
Describe the relationship between pressure and depth in liquids, and explain how this affects floating and sinking objects.
In liquids, pressure increases with depth due to the greater weight of liquid pressing down from above.
This pressure difference causes an upward force called upthrust.
If the upthrust is equal to the weight of an object, the object will float.
