The mass of a lift is 2000 kg. When the tension in the supporting cable is 28000 N, then its acceleration is :

4 m/s2 upwards 4 m/s2 downwards 14 m/s2 upwards 30 m/s2 downwards

4 m/s2 upwards

2000 a = 28000 - 20000 = 8000 a = \(\frac{8000}{2000}\) a = 4 m/s2 upwards