Answer:
Explanation:
Given
Dimension of Plastic sheet is 
Charge on sheet 
Charge density 

Sphere has mass of 
If sphere is suspended motionless then its weight is balanced by repulsion force
Repulsive force 
where E=Electric field due to sheet








Another way to test your question is to build your own miniature buildings. Depending on how in-depth you go, building could get a little pricey, but if you keep it basic there shouldn't be a problem. Decide on a certain number of foundations to test [maybe 3 or so] and try simulating an earthquake.
<span>Hope this helps! </span>