A-LevelPhysicsWork, energy and powerOct/Nov 2019Paper 2 Q29 Marks
A lift (elevator) of weight 13.0kN is connected by a cable to a motor, as shown in Fig. 2.1. [Figure 2.1] The lift is pulled up a vertical shaft by the cable. A constant frictional force of 2.0kN acts on the lift when it is moving. The variation with time t of the speed v of the lift is shown in Fig. 2.2. [Figure 2.2]
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