Your \(70-\mathrm{kg}\) friend always thinks he can dominate you in contests of strength because, even though you are a very athletic gymnast, your inertia is \(63 \mathrm{~kg}\). This time, while the gym class watches, he has attached a pulley to the ceiling of the gym, passed a rope over it, and tied one end of the rope around his waist. He hands you the other end of the rope, which is not quite long enough to reach the floor, and bets you that you cannot lift him off the ground by pulling on the rope. You realize that gravitational forces will favor your friend if the two of you are hanging on opposite sides of the pulley, but then you recall your amazing arm strength gained from years of work on gymnastic apparatus.