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Conservative forces Video Lecture | Crash Course for PAT

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1. What are conservative forces in physics?
Ans. Conservative forces are a type of force in physics that conserve mechanical energy. These forces depend only on the initial and final positions of an object and not on the path taken. Examples of conservative forces include gravity, electrostatic forces, and spring forces.
2. How do conservative forces affect work and energy?
Ans. Conservative forces have a direct relationship with work and energy. When an object moves in the direction of a conservative force, work is done by the force and the object gains energy. Conversely, when the object moves opposite to the direction of the conservative force, work is done on the object and it loses energy.
3. How is work related to conservative forces?
Ans. In the context of conservative forces, work is defined as the transfer of energy that occurs when an object moves against or with the force. When an object moves in the same direction as the conservative force, positive work is done, and when it moves opposite to the force, negative work is done.
4. Can conservative forces perform non-zero work in a closed loop?
Ans. No, conservative forces cannot perform non-zero work in a closed loop. Since these forces are path-independent, the work done by a conservative force in a closed loop is always zero. This is because the initial and final positions of the object are the same, and the net work done by the conservative force is zero.
5. What is the relationship between potential energy and conservative forces?
Ans. Conservative forces are associated with potential energy. The potential energy of an object in the presence of a conservative force depends on the position of the object relative to a reference point. As the object moves in the direction of the force, its potential energy decreases, and as it moves opposite to the force, its potential energy increases. The change in potential energy is equal to the negative of the work done by the conservative force.
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