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Vertical springs and energy conservation Video Lecture | Crash Course for PAT

FAQs on Vertical springs and energy conservation Video Lecture - Crash Course for PAT

1. What is work in the context of physics?

Ans. In physics, work is defined as the amount of energy transferred by a force acting through a distance. It is calculated by multiplying the force applied to an object with the distance over which the force is applied in the direction of the force. Work is measured in joules (J).

2. How is work related to energy?

Ans. Work and energy are closely related concepts in physics. The work done on an object is equal to the change in its energy. When work is done on an object, energy is transferred to or from the object, resulting in a change in its energy. Work can, therefore, be seen as a means of transferring energy from one object to another.

3. What is the difference between potential energy and kinetic energy?

Ans. Potential energy is the energy possessed by an object due to its position or condition. It is stored energy that has the potential to be converted into other forms of energy. On the other hand, kinetic energy is the energy possessed by an object due to its motion. It is the energy of an object in motion. The main difference between the two is that potential energy is associated with position or condition, while kinetic energy is associated with motion.

4. Can work be negative?

Ans. Yes, work can be negative. When a force is applied in the opposite direction to the displacement of an object, the work done by that force is negative. This means that energy is being transferred away from the object. Negative work can also occur when the displacement and force are at an angle greater than 90 degrees.

5. How is the work-energy theorem applied in practical situations?

Ans. The work-energy theorem states that the work done on an object is equal to the change in its kinetic energy. This theorem is widely applied in practical situations, such as calculating the work done by a car's engine to accelerate the car or the work done by a person lifting an object. By understanding the work done and the resulting change in kinetic energy, the efficiency and performance of various systems can be analyzed and optimized.

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Oct 10, 2025 Last updated

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