Which of the following is not a conservative force?
Correct answer: A. Friction
- A. Friction
- B. Electric
- C. Magnetic
- D. Gravitational
Explanation
A conservative force is a force applied in moving a particle from one point to another, such that the net amount of force is independent of the path taken by the particle. Friction is non-conservative because the amount of work done by friction depends on the path taken. The longer the path, the more the friction. Hence the answer is A.
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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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