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Mind Map (JEE Advanced): Work, Energy and Power
The document Mind Map (JEE Advanced): Work, Energy and Power is a part of the JEE Course Physics for JEE Main & Advanced.
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| 1. What is the definition of work in physics? |  |
Ans. In physics, work is defined as the product of the force applied to an object and the distance over which that force is applied in the direction of the force. Mathematically, it can be expressed as W = F × d × cos(θ), where W is work, F is the force, d is the distance, and θ is the angle between the force and the direction of motion.
| 2. How is kinetic energy calculated? | |
Ans. Kinetic energy is the energy possessed by an object due to its motion. It is calculated using the formula KE = ½ mv², where KE is kinetic energy, m is the mass of the object, and v is its velocity. This equation illustrates that kinetic energy increases with the square of the velocity, meaning that even small increases in speed result in significant increases in kinetic energy.
| 3. What is the principle of conservation of energy? | |
Ans. The principle of conservation of energy states that energy cannot be created or destroyed; it can only be transformed from one form to another. In a closed system, the total energy remains constant over time. For example, potential energy can be converted into kinetic energy and vice versa, but the total energy in the system remains unchanged.
| 4. What is the relationship between work, energy, and power? | |
Ans. Work and energy are closely related concepts in physics. When work is done on an object, energy is transferred to that object. Power, on the other hand, is the rate at which work is done or energy is transferred. It is calculated as P = W/t, where P is power, W is work done, and t is the time taken. Thus, power indicates how quickly energy is converted or transferred in a system.
| 5. How do you calculate gravitational potential energy? | |
Ans. Gravitational potential energy is the energy an object possesses due to its position in a gravitational field. It is calculated using the formula PE = mgh, where PE is gravitational potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height above a reference point. This equation shows that potential energy increases with height and mass.
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Apr 19, 2026 Last updated
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