2. Two teams, team A and team B, are having a tug-of-war with a sturdy rope. It has been an even match so far, with neither team moving. The net force on team A: A. Is not zero because the action and reaction forces do not cancel B. Is not zero because team B is pulling very hard C. Is zero because the force that team A pulls with is cancelled by the reaction force of the rope pulling back- D. Is zero because the force of the rope on team A is cancelled by the frictional force with the ground where the team A members are standing E. Is zero because of the strength of the members of team A - 2: A 86 kg skater is accelerated from rest at a rate of 1.5 m/s- for 5 seconds. A. How much force does the applied to the skater? B. What is the work done on the skater? - 3 A 550 kg couch is to be lifted 42 m above the ground. A. How much work is required to lift the couch straight up? B. How much work is required to slide the couch up a frictionless ramp to the same height? C. If the ramp is 300 m long, how much force is required? D. What work and force are required to lift the couch if you had a 6 pulley system? - 4 A normal force refers to a force that is A. Always directed straight up, in the opposite direction of gravity B. Always perpendicular to a surface C. Exerted by a surface to an object resting on the surface. D. A force that originates from typical (or normal) circumstance. E. Both b and c are correct