How much power would artificial gravity and inertial dampeners require?

Ignoring, for the sake of this question, how exactly the gravitational fields required for this to work are generated:

The question

Our stalwart adventurers have a spaceship, perhaps a gateship, fitted with inertial dampeners (for preventing their organs from being liquefied) and artificial gravity.

The artificial gravity exerts a constant downward acceleration of 10 m/s², and the inertial dampeners provide a variable multi-directional acceleration exactly counter to the acceleration of the ship itself.

Assuming that the artificial gravity generator is perfectly efficient (i.e. only the energy required for the gravity itself has to be accounted for) and that the artificial gravity only affects the things within the ship, not the ship itself: How much power is required to run the toys?

Examples that need to be accounted for

For each example, the ship contains 1 000 kg of stuff that needs to be affected by the gravity fields created, referred to as the payload, and itself weighs 49 000 kg; for a total mass of 50 000 kg. For the purposes of cross sectional area, the ship can be modelled as a cylinder with a diameter of 3 meters and a height of 10 meters, where the front and back of the ship are the flat ends.

Coasting

The ship is in a stable orbit around a planet. The ship experiences an apparent acceleration of 0 m/s², and the payload experiences a uniform downward acceleration of 10 m/s².

Manoeuvring

The ship is transferring between two orbits, burning prograde with a uniform acceleration of 5 m/s². The crew is experiencing no lateral acceleration and a uniform downward acceleration of 10 m/s².

Under attack!

The ship is in orbit, experiencing an apparent acceleration of 0 m/s² when a photon torpedo explodes 10 meters off the port side of the ship, releasing one gigajoule of energy. The ship holds, and experiences some lateral acceleration as a result, but the crew experiences no lateral acceleration, and a uniform downward acceleration of 10 m/s².

For each of the above examples, accounting for all forces, how much power is required by the artificial gravity generator?

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