A 1100 kg lift is held by 24 steel cables of mean diameter 20mm. The cables are attached to the lift top and arranged so the torsional vibration is minimised. The lift is accelerating upwards at a rate of 0.22m/s2 - It is driven by a winding drum of diameter 1.0m, which has a radius of gyration of 0.45m. The drums mass is 230kg. 1. What is the average tension per cable during the upwards acceleration? 2. If the lift moves upwards from a stationary position through a distance of 17m, how long does it take to climb this distance? How many revolutions has the drum made? 3. The secondary braking system fails and the lift freefalls through 5m before it kicks back in. The braking force is applied at a rate of 20kN/s for 0.8s.