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Q50 (NDA-I/2019) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Basic mechanics concepts Answer Verified

Which one of the following forces is non-central and non-conservative?

Result
Your answer: —  Â·  Correct: A
Explanation

A conservative force is one where the work done is independent of the path taken, such as gravitational and electric forces [4]. Central forces are those directed toward or away from a fixed point and depend only on the distance from that point. Gravitational and electric (Coulomb) forces are both central and conservative [3]. In contrast, frictional force is a non-conservative force because the work done against it depends on the path taken and energy is dissipated as heat rather than being stored as potential energy. Furthermore, friction is a non-central force as it acts tangentially to the surfaces in contact to oppose relative motion, rather than acting along a radial line toward a central point. Mechanical force is a broad category that can include both conservative (spring) and non-conservative (friction) components [1].

Sources

  1. [1] http://bepclots.bihar.gov.in/ptyrdimu/2021/04/12-Physics-Ncert-Chapter-2.pdf
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