The minimum acceleration with which a fireman can slide down a rope of breaking strength two-third of his weight is

Step-by-step solution

If fireman slides down with some acceleration then its apparent weight decreases. For critical condition rope can bear only 2 3 of the fireman's weight. Let a is the minimum acceleration then, Tension in the rope =m(g-a)= Breaking strength array ll & m(g-a)= 2 3 m g &=g- 2 g 3 = g 3 array