1. Anne is in a lift carrying a spring balance with a sample attached to it. The sample is hanging on a string attached to the end of the spring. She notices that the weight appears to change as she ascends and also when she descends. The mass of the sample is 4 kg. The acceleration of the lift ay is 2.00 m/s 2 . Figure 1: Anne standing in a lift carrying a spring balance with a sample attached to it. (a) What is the reading of the scales related to? (b) What are external forces acting on the sample? Draw the free body diagram for the sample when the sample is being accelerated upwards and when the sample is being accelerated downwards. (c) If the lift is either at rest or moving with constant velocity, what happens to the balance of the forces? (d) Show that as the lift is accelerating upwards and then downwards the spring scale gives a reading that is different from the weight of the sample by calculating the tension in the string. (e) Calculate the scale reading for this sample when the lift moves with the acceleration 2.00 m/s 2 . (f) Suppose the lift breaks and it is now in free fall. What happens to the reading of the scale