NO!
Depends on your definition of safe?
Drive shaft is going out
The drive shaft falls into the street. Before that the car shakes.
You have a serious problem. Have your car looked at before you drive it.
it is safe to drive slower because you could get in a car accident if you drive really fast
it could be, its an easy fix, you just have to balance your tires
The car needs a tune-up, or the motor mount(s) are bad.
The driver is responsible for the condition of the car and the safety of passengers. It it is not safe to drive, don't.
Depends on your definition of safe.
Yes
You can of course continue to drive it but it would seem you would not want to. A simple tire balance will solve the problem.
It is safe to drive you car for at least one mile after the check engine light comes on.
Yes