Which one of the following forces is non-central and non-conservative ?
[amp_mcq option1=”Frictional force” option2=”Electric force” option3=”Gravitational force” option4=”Mechanical force” correct=”option1″]
This question was previously asked in
UPSC NDA-1 – 2019
A conservative force is one for which the work done in moving an object between two points is independent of the path taken. Work done by a conservative force over a closed loop is zero. Electric and gravitational forces are conservative. Frictional force dissipates energy as heat; the work done by friction depends on the path taken and is always negative (it opposes motion), meaning it is a non-conservative force.