Early treatment for mental illness involved a0 because doctors believed that doing this would drain the mental illness out of the person’s body.

For the answer to the question above asking, if early treatment for mental illness involved a0 because doctors believed that doing this would drain the mental illness out of the person’s body.
I think you are asking f this is true or false. This statement is true.
That was what doctors believed. 

F  you double the  force, you double the acceleration, but  if  you double the  mass, you velocity. all bodies accelerate at the  same  rate regardless of size or  mass.