Question

What do u mean by conservation of mechanical energy? State the condition when it holds?

Answer 1

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

Answer 2

Mechanical Energy is conserved under conservative forces like gravity and forces by electric fields.

The conservation mechanical energy means that total energy =Potential +Kinetic Will be conserved for a body at any given point.