One end of a nylon rope is tied to a stationary support at the top of a vertical mine shaft of depth 80.0 . The rope is stretched taut by a box of mineral samples with mass 23.0 attached at the lower end. The mass of the rope is 2.50 . The geologist at the bottom of the mine signals to his colleague at the top by jerking the rope sideways. (Do not neglect the weight of the rope.)