Thanks for the reply! I decided to do your idea with the pulley and as of right now, I have a plank of wood lying flat on a desk and a makeshift pole attatched to the plank. One end of the string is fastened securely onto the pole, and rather than using a pulley, could I just lay the string over another block of wood(where a weight will be attached to dangle over a desk)? Basically, must it be a pulley on the other end of the string? Or can it be substituted with another block of wood.
Then that way I could calculate the force of tension using fG=fT=ma?