★ Must-know
📐 Formula — Pressure satisfies , where F is force and A is area.
📌 Increasing the area over which a force acts reduces pressure, so broad bag straps, broad bucket handles, and cloth rings under loads make carrying more comfortable.
Further detail
Broad straps spread force; narrow straps concentrate force.
1. Which expression defines pressure when a force acts perpendicular to a surface?
2. A force of 100 N acts perpendicular to an area of 2 m². What pressure does it produce?
3. Why does a pointed nail enter wood more easily than its broad head when the same force is applied?
What is pressure in terms of force and area?
Pressure is force acting per unit area perpendicular to the surface.
What formula expresses pressure using force and area?
Pressure is given by where F is force and A is area.
Why do a pointed nail and knife edge exert greater pressure?
Their smaller contact areas concentrate the applied force.
What causes liquid pressure to increase in a liquid column?
Increasing the height of the liquid column increases the pressure.
Pressure formula
P = F / A. Force per unit area.
Unit of pressure
Newton per square metre (Pa).
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