1.A 10 N weight is supported by a weightless cable where portion AB of the cable is horizontal. The coefficients of static and kinetic friction are 0.5.
a) Determine the value of P so that downward motion of the 10 N weight is impending.
b.)If P=3 N, determine the force in portion CD of the cable. Is the system in equilibrium or is there motion
2.A long concrete retaining wall with 2.4X10^3 kg/m^3 density is used to support a soil embankment. Assuming the soil behaves as a fluid with 1.5X10^3 kg/m^3 density, determine the required coefficient of friction so the wall does not slip along its base, and determine if the wall is safe from tipping