The necessary centripetal force to the moving around a copper track is provided by:
Correct answer: D. Frictional force
- A. Centrifugal force
- B. Gravitational force
- C. Coulumbs force
- D. Frictional force
Explanation
An object moving in circular motion around a copper track has centripetal force provided by the force of friction acting upon it.
This question appeared on the HEC Phase II 2017 paper, which you can sit online with every answer explained.
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About Newton's Laws of Motion
Newton’s laws explain inertia, the relation between net force and acceleration, and action-reaction pairs. Questions involve free-body diagrams, balanced and unbalanced forces, F = ma, force as the rate of change of momentum, and identifying genuine third-law pairs, which act on different bodies.
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