ME4.9 Weights and Fish Scale
The fish scale is horizontally attached to two strings. Each string has an equal weight of mass m hanging vertically over pulleys. Pose the question to the students if the scale should read m or 2m. Since one side is attached to the spring while the other is attached to the actual scale, the scale should read m. The tension in the rope is mg, not 2mg.
Equipment Location: I14-17