Which of the following is not conservative force_________________?
Correct answer: A. friction
- A. friction
- B. electric
- C. gravitational
- D. magnetic
Explanation
Friction is non-conservative because the work it does depends on the path and mechanical energy is converted into thermal energy. Electric, gravitational, and ideal magnetic forces are treated as conservative in this context. The likely wrong choice is d, magnetic force, due to confusing magnetic effects with energy loss caused by resistive forces.
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About Work
Work is done when a force produces displacement, with its value determined by the component of force along the displacement. The topic covers positive, negative and zero work, work by variable forces from force-displacement graphs, and the connection between net work and change in kinetic energy.
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