Mechanics 1 Help PleaseWatch
I have a question that I am currently doing and I have managed to do part a) correctly, I just have absolutely no idea how to do part b.
An object of mass 40kg is suspended by a light string from the ceiling of a lift of mass 200kg.
a) The lift accelerates upwards at 1.2ms^-2. Find the tension in the lift cable and the tension in the string.
b) The string breaks if it suffers a tension of more than 700N. Find the greatest possible tension in the lift cable if the string remains intact.Again, thanks in advance; I would appreciate not only an answer but your full workings out.
My working out for a)
To work out the tension in the cable for the object I did this:
40kg = approx 392N
(T - 40g) = 40 * 1.2
T = 440
Tension in the cable of the lift:
(T - 240g) = 240 * 1.2
T = 2640