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...I was feeling chatty...
So, now we know what chemists do when they are bored
Soooo, (without blowing the dust of any old books or anything) I suppose it's conventional to assign acceleration a positive value if it increases the magnitude of the velocity of an object, and a negative value if it decreases the magnitude of an object's velocity.
Acceleration can only be positive or negative in as much as it a vector quantity like speed as opposed to velocity, is there any way this should be shown in the equations ?.
"Actually, the shorter answer is no. (Not only because it's one letter less.)"?
What g do you feel if you are trapped in a thread on a closed loop trajectory like this one?