Question

What do you understand by the conservation of mechanical energy ? state the conditions under which mechanical energy is conserved

Answer 1

Mechanical energy is the sum of Potential Energy and Kinetic Energy. The only condition under which mechanical energy is conserved is that all the forces acting on it shouldbe conservative forces.

Answer 2

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Law of Conservation of Mechanical Energy: The total amount of mechanical energy, in a closed system in the absence of dissipative forces (e.g. friction, air resistance) remains constant. This means that potential energy can become kinetic energy or vice versa but energy cannot disappear.

Mechanical energy is the sum of the potential and kinetic energies in a system. The principle of the conservation of mechanical energy states that the total mechanical energy in a system (i.e., the sum of the potential plus kinetic energies) remains constant as long as the only forces acting are conservative forces.

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