Question

which equation represents the law of conservation of mechanical energy without dissipative forces? initial kinetic energy + initial potential energy = final kinetic energy + final potential energy change in kinetic energy + change in potential energy + change in thermal energy = 0 initial kinetic energy + initial potential energy = work done by non - conservative forces

Explanation:

The law of conservation of mechanical energy without dissipative forces states that the total mechanical energy (sum of kinetic and potential energies) remains constant. That is, the initial mechanical energy (initial kinetic + initial potential) equals the final mechanical energy (final kinetic + final potential). The second option includes thermal energy (related to dissipative forces) which is not relevant here. The third option involves non - conservative forces (which would be dissipative forces if they cause energy loss), so it is incorrect.

Answer:

Initial kinetic energy + Initial potential energy = Final kinetic energy + Final potential energy