Which one of them is not conservative force?
Correct answer: C. Tension in string
- A. Electric force
- B. Gravitational force
- C. Tension in string
- D. Elastic spring force
Explanation
A conservative force is a force that does not depend on the path taken by an object, only on its initial and final positions. The work done by a conservative force is independent of the path taken.Electric force and Gravitational force are conservative forces.Elastic spring force is also a conservative force.Tension in a string is a non-conservative force because it depends on the path taken. For example, if you lift an object vertically with a string, the work done by the tension force is equal to the weight of the object times the height it is lifted. However, if you lift the object along a curved path, the work done by the tension force will be different.
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Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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