Assume that the car at point A and the one at point E are traveling along circular paths that have the same radius. If the car at point A now moves twice as fast as the car at point E, how is the magnitude of its acceleration related to that of car E.

The magnitude of car A acceleration is 4 times that of car E

Explanation:

Assuming they are traveling at a constant speed. Their (centripetal) acceleration is as the following

where v is the (linear) velocity and r is the radius. We can use this to calculate their ratio

Since and

So the magnitude of car A acceleration is 4 times that of car E

your answer is, orbit around the nucleus