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FAQs on Past Year Paper, Physics (Set - 2), 2015, Class 11, Physics - Additional Study Material for NEET

1. What is the law of conservation of energy?
Ans. The law of conservation of energy states that energy cannot be created or destroyed, but it can be transferred or converted from one form to another. This means that the total amount of energy in a closed system remains constant over time.
2. What is the difference between potential energy and kinetic energy?
Ans. Potential energy is the energy that an object possesses due to its position or condition, while kinetic energy is the energy of an object in motion. Potential energy is stored energy, such as gravitational potential energy or elastic potential energy, while kinetic energy is the energy of motion, such as the kinetic energy of a moving car.
3. How does the conservation of energy apply to simple harmonic motion?
Ans. In simple harmonic motion, the total mechanical energy of a system remains constant. This is because the energy is continuously transferred between potential energy and kinetic energy as the object oscillates. When the object is at its maximum displacement, it has maximum potential energy and minimum kinetic energy. Conversely, when the object is at its equilibrium position, it has maximum kinetic energy and minimum potential energy.
4. What is the relationship between work and energy?
Ans. Work is the transfer of energy from one object to another. When work is done on an object, energy is transferred to that object, increasing its energy. The work-energy principle states that the work done on an object is equal to the change in its kinetic energy. This means that the work done on an object can change its speed or direction.
5. How is the conservation of energy related to the conservation of momentum?
Ans. Both the conservation of energy and the conservation of momentum are fundamental principles in physics. While the conservation of energy deals with the total energy of a system, the conservation of momentum deals with the total linear momentum of a system. In isolated systems where no external forces act, both energy and momentum are conserved. This means that the total energy and total momentum before an event or interaction are equal to the total energy and total momentum after the event or interaction.
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