Explain about contact and non contact force, gravitational force, atmospheric pressure.
Answers
Contact force:
The force that required contact to occur is known as contact force.
- Example: Writing with a pen.
Non contact force:
The force that acts on an object without coming in direct contact with it is known as non contact force.
- Example: Magnetic force.
Gravitational force:
The force of attraction between all masses in the universe is called as gravitational force.
- Example: Leaving falling from tree.
Atmospheric pressure:
The pressure within the atmosphere of the earth is called as atmospheric pressure.
- Example: A blow balloon.
Explanation:
Contact force : A force that acts through a direct contact
of two objects is called as contact force.
Non contact force : A force that acts between two objects even if the two objects are in not contact, is called a non contact force.
Gravitational force : Gravity in mechanics, the universal force of attraction acting between all matter is known as gravitational force.
Pressure : The force exerted perpendicularly on a unit area is called pressure.