Magnetic Force
Force which is exerted by Magnets is called Magnetic Force
Magnets exert force on either other magnets or on iron
Both these are magnetic force
Is Magnetic Force Contact Force or Non Contact Force?
It is a non contact force
Explanation
When one magnet is brought close to other magnet,both magnets move towards each other
Similarly if iron is brought near magnet,it moves towards
This happens without touching of both magnets
Hence, it is a non-contact force
Electrostatic Force
Force which is exerted on a electrically charged body on another body is called Electrostatic Force
Note
One body must be charged
The other body may be charged or uncharged
It is a non contact force because it works from Distance(even if 2 objects are not in physical contact with each other)
Example 1 - One Body Charged Other Uncharged
If one straw is rubbed with paper, it becomes electrically charged
If is brought near another straw which is not charged,they attract each other
Thus, charged body attracts uncharged body
Note
Electrostatic force is a Non Contact force as it works from distance(even if both objects are not in contact with each others)
Example 2 - Both Bodies are Charged
If 2 straws are charged and both near each other
They repel
Thus, 2 charged objects repel each other
Note-This happens without both straw touching each other,so it is a non contact source.
Gravitational Force
Every object on earth which has a mass exert a force on another object
This force is called gravitational force
Note
Gravitational force is a Non Contact force as it works from distance (even if both objects are not in contact with each others)
Example 1
If we throw a ball up,it falls down automatically
This is because of gravity(gravitational force of earth on ball)
Ball keeps moving towards the earth even if both are not in contact with each other yet,so it is Non Contact Force
Example 2
If we open a tap of water in a sink,water flows down
This is because of gravity(gravitational force of earth on water)
Water flows towards earth even though water and sink are not yet in contact with each other
