Rocks, earth aging, fossils
Answer:
Acceleration of the ship, 
Explanation:
It is given that,
Mass of both ships, 
Distance between two ships, d = 110 m
The gravitational force between two ships is given by :


F = 8.38 N
Let a is the acceleration. Now, using second law of motion as :



So, the acceleration of either ship due to the gravitational attraction of the other is
. Hence, this is the required solution.
This question is poorly stated, but I assume you mean what conditions are needed. It would have to be cold outside, correct?
The Bio-Mechanical term that defines managing your force while maintaining balance is "Stability"
The primary force would be Thermal Convection, it pushes it and thus makes continents drift.
-Hope that helps, Nexxmexx :3