This question is about an Earth-like planet that doesn't rotate around its own axis.
Normally the sun and moon rotate around the planet, providing a day/night cycle, but this has stopped for reasons. Now the sun, earth and moon are locked in a line. The earth doesn't turn, and neither does the moon circle around the planet. This means that one side is constantly lit up, while the other side has the moon but is in constant darkness.
Simple drawing of the situation, not to scale.
To recreate a day-night cycle, the plan is to rotate the planet instead of spinning the sun/moon around it. The small problem is that there currently is a civilization living on the planet, and they'd rather not be thrown off it. In fact, the civilization would rather not be significantly discomforted by the acceleration of the planet. Discomfort such as buildings collapsing, or parts of the civilization dying/being noticeably affected by the acceleration.
How long would it take for a tidally locked planet to be accelerated to spin around its own axis -similar to Earth- to reach Earth's rotation speed if we want to keep problems the acceleration causes to a minimum?
While I am looking for a more exact answer, a ballpark would be enough. could it be set up to happen in a few seconds? a minute? hour? day?
To preempt the questions:
- The planet, sun, and moon are about as big as ours.
- If this isn't enough, they can be considered the same size.
- The planet is sped up by exerting force on the entire planet at the same time. Magic.
- *This does not include inhabitants or constructs.
- Yes this question is about the mlp planet Equus.