Question

Swinging pendulum in vacuum obey conservation of energy. Explain.

Answer 1

A pendulum at rest on the Earth's surface will be subject to a normal force from the Earth's surface. As the pendulum swings in the vacuum box, the force exerted by the box on the ground increases and decreases, thereby causing vibrations that move into the Earth. This carries away energy from the pendulum

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Answer 2

Answer:

Swinging a pendulum in a vacuum obeys the conservation of energy because all the energy of the pendulum is conserved and remains the same. The potential energy of a pendulum swings from kinetic to potential energy, then back to kinetic energy, and so on.

Explanation:

• Energy's ability to alter forms is one of its most advantageous characteristics.
• Potential energy, which is stored energy, and kinetic energy, which is the energy of motion, are the two types of energy that make up a pendulum in a vacuum. These two together make up the pendulum system's mechanical energy.
• The potential energy of a pendulum swings from kinetic to potential energy, then back to kinetic energy, and so on.
• The mechanical energy of the swing at rest is all potential energy. It is not in motion, hence it has no kinetic energy.
• Some of the swing's potential energy transforms into kinetic energy as it descends.
• The swing's kinetic energy is at its highest since it is going at its fastest speed while it is at its lowest point. The swing is at its lowest point, which means that its potential energy is at its lowest.
• Again gaining potential energy as it rises, the swing. It again has zero kinetic energy and maximal potential energy at the peak of its arc.
• The air molecules' friction prevents the swing from moving freely through the air. As a result, some of the kinetic energy of the swing is converted into thermal energy and released into the environment. The swing slows down as its kinetic energy decreases.
• The swing comes to an end once all of its mechanical energy has been transformed into heat energy. Its potential energy and kinetic energy have been lost. However, the system's overall energy remains constant.

Thus, Swinging a pendulum in a vacuum obeys the conservation of energy because all the energy of the pendulum is conserved and remains the same. The potential energy of a pendulum swings from kinetic to potential energy, then back to kinetic energy, and so on.

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