what do you understand by conservative and non - conservative force. Give examples also?
Answers
Gravitational force is an example of a conservative force, while frictional force is an example of a non-conservative force. Other examples of conservative forces are: force in elastic spring, electrostatic force between two electric charges, and magnetic force between two magnetic poles.
Explanation:
A conservative force is a force that does not remove mechanical energy from the system. ... Non-conservative forces do remove mechanical energy from the system. Examples of non-conservative forces include air resistance and (kinetic) friction. Conservative forces can be associated with a Potential Energy.
CONSERVATIVE AND NON-CONSERVATIVE FORCES - DEFINITION
If work done by any force in a closed path is zero then the force is conservative else it would be non-conservative. For this defining any arbitrary closed path work done has to be calculated.
EXAMPLES OF CONSERVATIVE AND NON-CONSERVATIVE FORCES - DEFINITION
Force due to gravity is conservative force as work done from taking an object from height h to ground is +mgh whereas it's −mgh on the other way around. However, friction is an example of non-conservative force. Work done by friction in dragging an object to distance r is −fr and in retracing the same path work done would be −fr so total work done will be −2fr
Hope this helps mate ☺️.