Learn Class 8 Science - Force and Pressure

The force and pressure chapter is related to class 8th. What does one mean by force and pressure? What are different types of force?

Force and Pressure:

Meaning

• When we pull or push any item, then it is called force.
• Or, when there is any interaction between objects, it develops force.
• The force’s strength is always called magnitude.

Types

Contact force:

When we touch any item, then it moves. Well, it is known as contact force.

For example, Pulling, Lifting, Kicking and Pushing.

Muscular force:

When we apply force with the help of our muscles, it is called muscular force.

For example, Magnetic force gravitational force.

Nuclear forces:

• It is the force that will act between all the particles.
• The particles consist of protons, neutrons, and many others.

Non-contact forces:

• The force which does not make any contact.
• LIKE: Magnetic force, gravitational force, an electrostatic force.

Pressure

It is the per-unit force over an area.

• The formula for pressure: Force/Area.
• The unit of force is Pascal.

Distribution (Pressure):

• The force which acts on the smaller area has more pressure.
• Example: Porters, sharper knife