Consider the 49.0 kg mountain climber in the gure. (a) Find the tension in the rope (in N) and the force that the mountain climber must exert with her feet (in N) on the vertical rock face to remain stationary. Assume that the force is exerted parallel to her legs. Also, assume negligible force exerted by her arms. tension in rope |:] N |:l N force on feet (b) What is the minimum coefficient of friction between her shoes and the cliff? |:l You are helping your friend move a new refrigerator into his kitchen. You apply a horizontal force of 265 N in the negative x direction to try and move the 55 kg refrigerator. The coefficient of static friction is 0.73. (a) How much static frictional force does the floor exert on the refrigerator? Give both magnitude (in N) and direction. magnitude |:| N direction / (b) What maximum force (in N) do you need to apply before the refrigerator starts to move? :lN