Conservation of Mechanical Energy

K E_{1} + P E_{1} = K E_{2} + P E_{2}

Total mechanical energy is conserved in absence of non-conservative forces.

Variables

KE₁

Initial kinetic energy

KE at position 1

PE₁

Initial potential energy

PE at position 1

KE₂

Final kinetic energy

KE at position 2

PE₂

Final potential energy

PE at position 2

When only conservative forces act, E_total = KE + PE = constant.

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