This is probably an easy question for someone but I am struggling with it. You have a bag of sand that weighs exactly the same as another person, and the bag of sand is on one side of a frictionless pulley and a wieghtless rope while the person is on the other side of the pulley. The person starts to climb the rope towards the pulley sometimes climbing faster and othertimes slowing down. What would you notice about the bag of sand on the other side of the pulley? I would assume that the weight and the person would continue to stay the same distance from the pulley? What is a good reasoning for this?