JEE Advanced 2020 Concept Recapitulation Test 1 Paper 2

Two block A and B each of mass ‌

1

2

kg is connected by a massless inextensible string and kept on µs=0.2‌‌µs=0.4
horizontal surface. Coefficient of friction between block and surface shown in figure. A force F=kt (where k= 1N∕s and t is time in second) applied on A. Then (g= 10m∕s2)