Mechanical energy

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An example o a mechanical system: A satellite orbits the Yird anly influenced bi the conservative gravitational force an the mechanical energy is tharefore conserved. It is acceleratit towards the Yird wi an acceleration (green vector) perpendicular tae velocity (reid vector). Tho the direction o the velocity vector is constantly chynged acause o the acceleration vector, the speed o the satellite is nae syne the magnitude o the velocity vector remains unchynged.

In the physical sciences, mechanical energy is the sum o potential energy an kinetic energy.