The 100-lb boy at A is suspended from the cable that passes over the quarter circular cliff rock. What horizontal force must the woman at A exert on the cable in order to let the boy descend at constant velocity? The coefficients of static and kinetic friction between the cable and the rock are ms = 0.4 and mk = 0.35, respectively.

ENGR 232 Dynamic Engineering Systems Lecture 2 Dr. Michael Ryan This Lecture • Two simple models: object with drag, mice and owls – Solution to D.E. Via separation of variables • Separable differential equations – Analytic Solutions – Closed form – Implicit form » Domain of solution » Qualitative solutions » Numerical solutions • Method of Integrating Factors 4/6/2015 ENGR 232 Winter 14-15 Week 2 2 Falling Objects: Increasing Model Complexity • A hailstone has mass m=0.025 kg an2 drag coefficient =0.007 kg/s. g = 9.8 m/sec • Taking motion d