NEET > Physics Class 11 > Work-Energy Theorem
Work-Energy Theorem Video Lecture - Physics Class 11 - NEET
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FAQs on Work-Energy Theorem Video Lecture - Physics Class 11 - NEET
| 1. What is the Work-Energy Theorem? |  |
Ans. The Work-Energy Theorem states that the work done on an object is equal to the change in its kinetic energy. This means that the net work done on an object is directly proportional to the change in its velocity.
| 2. How is the Work-Energy Theorem related to the conservation of energy? | |
Ans. The Work-Energy Theorem is closely related to the conservation of energy. According to the theorem, the work done on an object results in a change in its kinetic energy. Since energy cannot be created or destroyed, the work done on an object is equal to the change in its kinetic energy, demonstrating the conservation of energy.
| 3. Can you provide an example to illustrate the application of the Work-Energy Theorem? | |
Ans. Certainly! Let's consider a ball being thrown vertically upwards. As the ball ascends, the work done by the force of gravity is negative, as it acts in the opposite direction of the displacement. At the highest point of the ball's trajectory, its velocity is momentarily zero, resulting in a maximum change in kinetic energy. As the ball falls back down, the work done by gravity is positive, and the change in kinetic energy is negative. This example showcases the application of the Work-Energy Theorem, as the net work done on the ball corresponds to the change in its kinetic energy.
| 4. Are there any limitations or assumptions associated with the Work-Energy Theorem? | |
Ans. Yes, there are certain limitations and assumptions associated with the Work-Energy Theorem. One assumption is that only conservative forces are considered, meaning that no work is done by non-conservative forces such as friction or air resistance. Additionally, the theorem assumes that the work is done along a straight line and that the mass of the object remains constant.
| 5. How can the Work-Energy Theorem be applied to calculate the speed of an object? | |
Ans. The Work-Energy Theorem can be applied to calculate the speed of an object by considering the initial and final kinetic energies. If the net work done on the object is known, it can be equated to the change in kinetic energy. By rearranging the equation, the final velocity of the object can be determined. This application of the theorem allows for the calculation of an object's speed based on the work done on it.
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