Hanging the weight from a single string over a pulley demonstrates that the pulley doesn’t affect tension in the string. Hanging the weight from two strings at 45-degree angles demonstrates that opposing forces increases the tension in each string. Hanging the weight from a string looped over a pulley demonstrates that the tension in the string on one side of a pulley is the same as the tension on the other side.
Location: C2-5 (bucket), HI (scale)