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Work and the Work-Energy Principle Video Lecture | Crash Course for PAT
FAQs on Work and the Work-Energy Principle Video Lecture - Crash Course for PAT
| 1. What is work and energy? |  |
Ans. Work is defined as the transfer of energy that occurs when a force is applied to an object and the object is displaced in the direction of the force. Energy, on the other hand, is the capacity to do work. In simpler terms, work is the process of exerting force to move an object, while energy is the ability to perform work.
| 2. What are the different types of energy? | |
Ans. There are several types of energy, including:
- Kinetic energy: the energy possessed by a moving object.
- Potential energy: the energy stored in an object due to its position or state.
- Thermal energy: the energy associated with the temperature of an object.
- Chemical energy: the energy stored in the bonds of chemical compounds.
- Nuclear energy: the energy released during nuclear reactions.
| 3. How is work calculated? | |
Ans. Work is calculated by multiplying the force applied to an object by the displacement of the object in the direction of the force. Mathematically, work (W) can be calculated using the formula: W = F * d * cos(theta), where F is the force applied, d is the displacement, and theta is the angle between the force and displacement vectors.
| 4. What is the principle of conservation of energy? | |
Ans. The principle of conservation of energy states that energy can neither be created nor destroyed, but it can be transformed from one form to another or transferred between objects. In other words, the total amount of energy in a closed system remains constant over time.
| 5. How does energy relate to power? | |
Ans. Energy and power are related concepts, but they have different meanings. Energy is the capacity to do work, while power is the rate at which work is done or energy is transferred. Mathematically, power (P) can be calculated by dividing the amount of work done (W) by the time (t) taken to do the work: P = W / t.
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Oct 10, 2025
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