1. Part One: A mass M1 = 30 kg is suspended by a light string from the ceiling of a lift of mass M2 = 300kg. If the lift accelerates upwards at 1 m/s2, what is the tension in the lift cable and in the string? (g=9.8 m/s) Part Two: If the string breaks when subjected to a tension of more than 700 N, what is the greatest possible tension in the lift cable so that the string remains intact? 2. Relevant equations: t-mg=ma , f=ma 3. The attempt at a solution: Part One: Tension in string, t-mg=ma, t-(30)(9.8)=30(1), t=324N Tension in lift cable, t-mg=ma, t-(300)(9.8)=300(1), t=3240N ( Is this correct ?) Part two: Not sure about part two.