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Work-Energy Theorem Video Lecture | Physics Class 11 - NEET
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 if you apply a force to an object and move it, the work done by that force will result in a change in the object's speed or direction, reflecting a change in its kinetic energy.
| 2. How do you calculate work done in the context of the Work-Energy Theorem? | |
Ans. Work is calculated as the product of the force applied to the object and the distance over which that force is applied, along with the cosine of the angle between the force and the direction of motion. The formula is W = F * d * cos(θ), where W is work, F is force, d is distance, and θ is the angle.
| 3. Can the Work-Energy Theorem be applied to systems involving friction? | |
Ans. Yes, the Work-Energy Theorem can be applied to systems involving friction. In this case, the work done by friction will be negative, as it opposes the motion. The total work done on the object will include the work done by all forces, including friction, and will still equate to the change in kinetic energy.
| 4. What are some real-life applications of the Work-Energy Theorem? | |
Ans. Real-life applications of the Work-Energy Theorem include understanding how vehicles accelerate or decelerate, analyzing the motion of roller coasters, calculating the energy used in lifting objects, and designing safety features in cars that absorb energy during collisions.
| 5. How does the Work-Energy Theorem relate to potential energy? | |
Ans. The Work-Energy Theorem relates to potential energy as it shows that work done against gravity or other forces can change an object's potential energy. For instance, when lifting an object, work is done against gravitational force, resulting in an increase in the object's gravitational potential energy, which can later be converted back to kinetic energy when the object falls.
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