A55 kg rock climber is in a lie-back climb along a fissure, with hands pulling on one side of the fissure and feet pressed against the opposite side. the fissure has width w = 0.200 m, and the 0.400 m center of mass of the climber is a horizontal distance d from the fissure. the coefficient of static friction between hands and rock is u1 0.400, and between boots and rock it is u2 = 1.20 h (a) what is the least horizontal pull by the hands and push by the feet that will keep the climber stable? com (b) for the horizontal pull of (a), what must be the vertical distance h between hands and feet? (c) if the climber encounters wet rock, so that l1 and h2 are reduced, what happens to the answer in (a) and (b)?