John wants to move a 200-kg rock using a stiff bar measuring 3 meters long as a lever. he puts the fulcrum x meters from the rock. assume that g = 10m/s^2. 2-1. sketch this in a diagram and annotate the forces/velocities. (10pts) 2-2. if x = 0.5m, how much force must he use in order to move the rock? (10pts) 2-3. if the maximum force he can exert on the crowbar is 500n, what is

Diego is trying to lift a piano to the second floor of his house. diego uses a pulley system and gives a big lift to the piano. the piano moves upward, then stops, and then it starts to fall to the ground. which list best describes the forces on the piano in the proper order? a.positive force, balanced force, negative force b.negative force, balanced force, positive force c.positive force, unbalanced force, negative force d. negative force, unbalanced force, positive force