Question

Differentiate between contact and non contact force?

Answer 1

	Contact Forces	Non-Contact Forces
1.	These forces require a physical touch or contact between the two objects.	These forces do not require any physical touch to work on the object.
2.	Since, in contact force, contact is to be made between the two objects therefore it does not work from a distance.	Since, in non- contact force contact is not required between the two objects, therefore it can work from a distance.
3.	Contact force includes muscular force, the normal force, the tension and the frictional force.	Non-contact force includes electro-magnetic force, gravitational force and electrostatic force.
4.	For Example, muscular force is required to kick the ball, else the ball would not move.	For example, There is no contact between a free falling object and Earth.