Class 8 / Science
Class 8 Science Force and Pressure Notes
Study notes on force, pressure, contact forces, non-contact forces, and everyday applications.
mediumRevision notes
Key points
- Force can change the state of motion or shape of an object.
- Pressure depends on force and area.
- Smaller area creates greater pressure for the same force.
Types of force
Contact forces need physical touch, such as friction and muscular force.
Non-contact forces act from a distance, such as magnetic force and gravitational force.
Pressure in daily life
Sharp knives, pointed nails, and broad school bag straps all use the relation between pressure and area.
Students should explain these examples using force divided by area.
Quick practice
- Give two examples of contact force.
- Why are bag straps broad?
- What happens to pressure when area decreases?
Related practice
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