Differentiate contact and non contact forces give examples for both
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Contact forces
These are forces which need a physical touch on the object to act upon it.
These may or may not be natural forces.
They can not work from a distance.
Non-contact forces
These are forces which do not need a physical contact to act on an object.
These are natural forces
They can work from a distance as well.
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a non contact force is that which acts on an object without coming physically in contact with it ... contact force is that force which is applied to a body by another body that is in contact with it.. example of non contact force - an apple falling from a tree example of contact force pushing a car up a hill.
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