1.

Differentiate between contact and non-contact force. Support your answer with suitable examples.

Answer»
Contact forces Non-contact forces
(i) These are forces which need a physical touch on the object to act upon it.These are forces which do not need a physical contact to act on an object.
(ii) These may or may not be natural forces.These are natural forces
(iii) They can not work from a distance.They can work from a distance as well.
(iv) Its various types are applied force, normal force, tansion frictional force,its various types are magnetic force electrostatic force,gravitational force,
(v) Examples player kiicking a ball game of tug of war rolling ball stops itself  horse pulling a cart etc,Examples: magnet attracting iron nails, mango falling from tree, charged plastic ruler attracts bits of dry - paper etc.



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