Consider a simple elevator design in which a 15,000 kg car A is connected to a 12,000 kg c...

Consider a simple elevator design in which a 15,000 kg car A is connected to a 12,000 kg counterweight B. Suppose that a failure of the drive system occurs (the failure does not affect the rope connecting A and B) when the car is at rest and 50 m above its buffer, causing the elevator car to fall. Model the car and the counterweight as particles and the cord as massless and inextensible, and model the action of the emergency brakes using a Coulomb friction model with kinetic friction coefficient μk = 0.5 and a normal force equal to 35% of the car’s weight. Determine the speed with which the car impacts the buffer.

Figure P4.60