Question

Assume that a climber having mass M, and who are L tall, rappels down a vertical cliff with her body rose at a 43 degree angle above the horizontal. The climber has a center of gravity at R_g from her feet; she holds the rope at R_r from her feet, and makes at a 23 degree angle with the cliff face. Also, hanging straight down from her shoulders (a distance R_b from her feet) is a backpack having mass m. assume that R_g < R_r < R_b < L. Call horizontal and vertical forces between her feet and the wall H and V. write down the expression for net torque acting on her with respect to the top of her head.